Merging signed functionality into PropagateDistanceField, adding remove capabilities, and adding a few comments and extra tests
Adding a bunch of functions for adding and moving points, and changing the behavior of the update function.  Tests are failing.
Merge remote-tracking branch 'upstream/groovy-devel' into groovy-devel
Fixing some bugs for signed distance field and improving tests
Removing pf_distance stuff, adding some more performance, getting rid of addCollisionMapToField function
Getting rid of obstacle_voxel set as it just slows things down
Adding performance averages
Merge remote-tracking branch 'gil/groovy-devel' into groovy-devel