The cob_common stack hosts common packages that are used within the Care-O-bot repository. E.g. utility packages or common message and service definitions etc. Also the urdf desciption of the robot is located in this stack.
mecanum wheels (maybe a little too much effort here, but it looks nice)
Moving the robot is done with the planar move plugin. mecanum wheels rely on slip, which is hard to implement/simulate and since there is no out of the box plugin for gazebo this is the "lowest effort for reasonable functionality" solution
should fix the remarks from #250 and #264
Gazebo Screenshot:![image](https://user-images.githubusercontent.com/2291652/73195002-64481200-412d-11ea-810a-1184f7fb3478.png)