Made svg2world executable. Fixed number recognition in paths
Added a huge labyrinth. svg2world now reacts on object id to choose type
Made the grid decimal - 10, 5, 2, 1
Merged nice things (API changes) from 'coursera' branch
Split Supervisor.process into Supervisor.process_state_info and Supervisor.get_controller_parameters

Rationale: These two parts have to be executed one before, and one after switching in the case
the controllers need different output (unlike in khepera3)
Added get_heading_angle to pid_controller for easier drawing
Improved K3Full behaviour
Merge new features from 'stage' into coursera. Fixed bugs