fix #39
0.3.9
Merge pull request #37 from acornacorn/groovy-devel

add collision spheres
0.4.0
fix #41
git add option for minimum fraction of 'sometimes in collision'
SRDFWriter: add INCLUDE_DIRS to catkin_package command so srdf_writer.h can be used by other packages.
SRDFWriter: add initModel() method for initializing from an existing urdf/srdf model in memory.