Untested implementation of DistanceFieldManager.
Started adding DistanceFieldManager tests.
Added two more skeleton unit tests.
Registered Python unittests with Catkin.
Updated unit tests for namespace changes.
Fixed missing import when running inside nosetest.
Deprecated DistanceFieldManager.
Merge branch 'master' into feature/DistanceFieldManager

Conflicts:
	tests/test_PlanningPipeline.py
Fixed a missing import in PlanningPipeline tests.
Merge pull request #8 from personalrobotics/feature/DistanceFieldManager

Added DistanceFieldManager for CHOMP.