Cleaned up the DropletCustom programs.
Added a GetPhysiWorldObj function in DSimDataLogger.
work on 3d picking, rebasing to changes anshul made in master
custom droplet code for 3d picking
removed dark gray from droplet texture
custom one is now color coded droplets for testing 3d picking
change from moving shader location?
Merge branch '_3d_picking' of github.com:mcevoyandy/cu-droplet-sim into _3d_picking