Fixes for PoissonRecon compilation on Mac OS X 10.9
Details in plugins/qPoissonRecon/README.txt
Merge pull request #141 from asmaloney/poisson_fixes

Fixes for PoissonRecon compilation on Mac OS X 10.9
For compilation on Linux
Minor code updates
fix drop/drag-ability of licked hierarchy objects
various changes oth in qPCL and sensor stuff