Make header files accessible
Permit derived class access to base class methods and variables
Core ICP routine virtualized

The ICP pose estimation routine is a critical component of the
class. Virtualizing performICP allows for development using
derived classes with a overriding (custom) performICP routine of
its own, without tampering with PCL's own version
Make these functions accessible to derived classes
Support mesh extraction from multiple pcd files
Camera pose files record more precise model
A slightly coarser TSDF volume (8mm) frees up GPU resources for other tasks.
Additional class variables that need to be set when this function is called
Use correct VTK_INCLUDE variable (vtk-5.8)
Necessary cmake include path variable for vtk (vtk-5.8)
Missing install dependency
Merge branch 'wc' of git://github.com/rjcharron/pcl into wc

* 'wc' of git://github.com/rjcharron/pcl: (125 commits)
  Expose parameters that control bilateral filter applied to raw depth data
  Missing install dependency
  Necessary cmake include path variable for vtk (vtk-5.8)
  Use correct VTK_INCLUDE variable (vtk-5.8)
  Additional class variables that need to be set when this function is called
  A slightly coarser TSDF volume (8mm) frees up GPU resources for other tasks.
  Camera pose files record more precise model
  Support mesh extraction from multiple pcd files
  Make these functions accessible to derived classes
  Core ICP routine virtualized
  Permit derived class access to base class methods and variables
  Make header files accessible
  Added an additional vector<short> which keeps track of mappings from centroid clusters to VFH signatures -- which occurs when axes can't be disambiguated.
  Upload documentation to GitHub only if generation succeeded
  Fix warnings in octree/octree_pointcloud_changedetector.h
  Fix warnings in test/test_grabbers.cpp
  Fix warnings in common/io.hpp
  Fix warnings in people/person_classifier.hpp
  Fix warnings in people/height_map_2d.hpp
  Fix warnings in people/ground_based_people_detection_app.hpp
  ...