Add:  PCL - Point Cloud Library 1.6 and 1.7.  Fix VTK
Merge branch 'master' of https://github.com/trad511/trad511-exheres.git

Conflicts:
	packages/sci-libs/pcl/pcl-1.6.0.exheres-0
	packages/sci-libs/pcl/pcl.exlib
Correct merge conflicts