Added dependency check to pcl_cuda_io

* Several headers depend on openni_image.h
Merge pull request #545 from kwaegel/dependency_check

Added dependency check to pcl_cuda_io
Display camera parameters with info, fov in degres
Merge pull request #544 from VictorLamoine/camera_fixes

Modified interactor style: display camera parameters
Fixing missing addData method in setOccupiedVoxelAtPoint/OctreePointCloudOccupancy
Merge pull request #551 from jkammerl/OctreePointCloudOccupancy-fix

Fixing missing addData method in OctreePointCloudOccupancy
Update assembleRegions() in region_growing_rgb.hpp to speed up empty
segment deletion.
Merge pull request #538 from shengshuyang/master

updated assembleRegion() in region_growing_rgb.hpp to speed up algorithm