[btr] fix for the DEBUG-COSTMAP predicate:

it used to cause a recursive mutex lock
Merge branch 'master' of github.com:gaya-/cram_physics
Merge branch 'master' of github.com:gaya-/cram_physics
Merge branch 'master' of github.com:gaya-/cram_physics
added global variables for costmap orientation and height
Merge pull request #11 from yazdani/master

added global variables for costmap orientation and height
corrected the functionality of a pattern
Merge pull request #12 from yazdani/master

Bugfix for the JOINT-STATE predicate
Added .gitignore for robot_mask to ignore autogenerated python code (messages)
Added pancake as object instance for bullet worlds
Added symbols for pancake and pancakemaker
Merge branch 'master' of github.com:cram-code/cram_physics
Merge branch 'master' of github.com:gaya-/cram_physics
Merge pull request #10 from gaya-/master

spatial relations improvements and spatulas related in btr

Works fine for me.
Merge branch 'master' of github.com:cram-code/cram_physics
Merge pull request #13 from fairlight1337/master

Just a few details; exporting symbols, adding an object-adder, updating .gitignore
Added functions to create a urdf description from a robot model
Exported generate-urdf
Forgot a ',' and to check if the limits are unbound
Added unit-tests and test-urdfs