Issue #564: Fix tutorials warning

There are still warnings for things I don't know how to fix or dead links I can't repair:
* **images/pcl_painter2D_contextItem.png** is missing
* Can't find **pcl::Registration::align** etc... in **pcl.tag**
* WARNING: Inline interpreted text or phrase reference start-string without end-string. I don't understand what is the problem

This is the warning list; a little bit shorter :

```
~/pcl/doc/tutorials/content/compiling_pcl_dependencies_windows.rst:163: WARNING: Inline interpreted text or phrase reference start-string without end-string.
~/pcl/doc/tutorials/content/pcl_painter2D.rst:None: WARNING: image file not readable: images/pcl_painter2D_contextItem.png
~/pcl/doc/tutorials/content/random_sample_consensus.rst:126: WARNING: duplicate citation Wikipedia, other instance in ~/pcl/doc/tutorials/content/kdtree_search.rst
~/pcl/doc/tutorials/content/template_alignment.rst:102: WARNING: Could not find match for `pcl::Registration::align` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/template_alignment.rst:102: WARNING: Could not find match for `pcl::Registration::align` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/walkthrough.rst:647: WARNING: duplicate label search, other instance in ~/pcl/doc/tutorials/content/search.rst
~/pcl/doc/tutorials/content/writing_new_classes.rst:326: WARNING: Could not find match for `PCL_XYZ_POINT_TYPES` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:330: WARNING: Could not find match for `pcl::PointXYZI` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:330: WARNING: Could not find match for `pcl::PointXYZINormal` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:413: WARNING: Could not find match for `pcl::PCLBase::setInputCloud` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:413: WARNING: Could not find match for `pcl::PCLBase::input_` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:433: WARNING: Could not find match for `pcl::Filter::applyFilter` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:670: WARNING: Could not find match for `PCL_ERROR` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:679: WARNING: Could not find match for `pcl::OrganizedDataIndex` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:782: WARNING: Could not find match for `pcl::PCLBase::setInputCloud` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:782: WARNING: Could not find match for `pcl::PCLBase::setIndices` in `../../../build/doc/doxygen/pcl.tag` tag file
~/pcl/doc/tutorials/content/writing_new_classes.rst:890: WARNING: Could not find match for `pcl::PCLBase::indices_` in `../../../build/doc/doxygen/pcl.tag` tag file
looking for now-outdated files... none found
pickling environment... done
checking consistency... ~/pcl/doc/tutorials/content/adding_custom_ptype.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/alignment_prerejective.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/basic_structures.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/benchmark.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/benchmark_filters.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/bspline_fitting.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/building_pcl.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/cloud_viewer.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/cluster_extraction.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/compiling_pcl_dependencies_windows.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/compiling_pcl_macosx.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/compiling_pcl_windows.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/compression.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/concatenate_clouds.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/concatenate_fields.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/concatenate_points.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/conditional_euclidean_clustering.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/conditional_removal.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/convex_hull_2d.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/correspondence_grouping.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/cylinder_segmentation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/dinast_grabber.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/don_segmentation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/extract_indices.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/fpfh_estimation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/gpu_install.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/gpu_people.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/greedy_projection.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/ground_based_rgbd_people_detection.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/hdl_grabber.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/how_features_work.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/hull_2d.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/implicit_shape_model.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/in_hand_scanner.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/installing_homebrew.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/interactive_icp.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/iterative_closest_point.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/kdtree_search.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/matrix_transform.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/min_cut_segmentation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/mobile_streaming.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/moment_of_inertia.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/narf_descriptor_visualization.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/narf_feature_extraction.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/narf_keypoint_extraction.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/normal_distributions_transform.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/normal_estimation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/normal_estimation_using_integral_images.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/octree.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/octree_change.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/openni_grabber.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/pairwise_incremental_registration.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/passthrough.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/pcd_file_format.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/pcl_painter2D.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/pcl_plotter.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/pcl_visualizer.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/pfh_estimation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/planar_segmentation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/progressive_morphological_filtering.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/project_inliers.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/radius_outlier_removal.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/random_sample_consensus.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/range_image_border_extraction.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/range_image_creation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/range_image_visualization.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/reading_pcd.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/region_growing_rgb_segmentation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/region_growing_segmentation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/registration_api.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/remove_outliers.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/resampling.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/rops_feature.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/statistical_outlier.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/supervoxel_clustering.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/template_alignment.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/tracking.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/using_kinfu_large_scale.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/using_pcl_pcl_config.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/using_pcl_with_eclipse.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/vfh_estimation.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/vfh_recognition.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/voxel_grid.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/walkthrough.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/writing_new_classes.rst:: WARNING: document isn't included in any toctree
~/pcl/doc/tutorials/content/writing_pcd.rst:: WARNING: document isn't included in any toctree
done
```