Updated collision models of hdt arm and pr2 arm with new voxelized groups
Removed bresenham from collision checking library. Put in leatherman.
Fixed the new voxel groups
Small changes in collision space to work with new voxel groups.
Fixed the ActionSet class to take in the filename of the motion prim file in the constructor...no more hardcoded path.
Added motion prim file to the launch files. Need to make sure that the test still works for both pr2 and hdt
Merge branch 'master' of https://github.com/bcohen/sbpl_manipulation into groovy

Conflicts:
	sbpl_collision_checking/src/group.cpp