Shorter workflows, pylinkage>=0.5.0 support

This release bring a lot improvments for your code workflows, as well as support for the beta version of pylinkage which had optimized optimizers.

Added

• It is now possible and advised to import class and functions using quick paths, for instance from leggedsnake import Walker instead of from leggedsnake.walker import Walker.
• You do no longer have to manually import pylinkage, we silently import the useful stuff for you.
• We now use bump2version for version maintenance.
• This is fixed by the road_y parameter in World let you define a custom height for the base ground.

Changed

• docs/examples/strider.py has been updated to the latest version of leggedsnake 0.1.4.

Fixed

• The full swarm representation in polar graph has been repaired in docs/examples/strider.py.
• During a dynamic simulation, linkages with long legs could appear through the road.
• The documentation was not properly rendered because Napoleon (NumPy coding style) was not integrated.