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
Initial implementation of adding octree function and test
Adding in octree constructor and some additional fields and tests
Significant refactoring to allow reading and writing in distance field, and adding boost::iostreams to CMakeLists.txt as we use zlib compression for writing/reading distance fields to/from disk
Adding comments to voxel grid
Merge remote-tracking branch 'upstream/groovy-devel' into groovy-devel
Fixing compilation issues on test_constraint_sampler, adding docs for voxel grid, and adding functions for adding different resoluition octree and test
Adding functionality and test that shapes::OcTree are handled differently than other shapes, and full documentation for distance_field.h
Fixing compilation issues and adding some comments to propagation_distance_field
Adding gradient tests, many more comments in propagation_distance_field.h, and doing a bit of refactoring
Starting to work through doxygen generated stuff
Adding test for signed distance field, not quite working yet
Finishing distance_field docs
Merge pull request #37 from egiljones/groovy-devel

Groovy devel
Looks good and seems to work in rviz with FCL or Hybrid collision.  Thanks!