Add cmake macro to remove VTK definitions.
Remove VTK definitions for CUDA build targets.
Fixed the issues with testing the RSD and GRSD features, where the normal estimation was incorrectly asserted
Merge pull request #828 from desinghkar/test_grsd_rsd

Fix #826
Merge pull request #829 from VictorLamoine/master

Fix dead link in correspondence grouping tutorial
Fix include in 'keypoint.hpp' (2d module)

'pcl/2d/convolution_2d.h' does not exist. Should be 'pcl/2d/convolution.h' instead.
Merge pull request #824 from duga3/fix/vtk6-cuda-compile

Fix compile for CUDA and VTK 6.
Merge pull request #830 from taketwo/fix-convolution-include

Fix include in 'keypoint.hpp' (2d module)
Format code to PCL style
Update code and tutorial
Update tutorial