gladys-0.2.7

Changes since v0.2.6:

Patrick Bechon (13):
      [gladys] Update the parameter names to emphasize the fact that they are not interchangeable
      [robot_model] fix a typo creating a memory error (using uninitialized memory)
      [visibility] Allow is_visible to use 3D points. Use it for gladys.can_communicate
      [test] Add a test for the 3D visibility check
      [visibility] Fix compilation error on older GCC
      [test] Fix compilation error on older GCC
      [nav_graph] add a function to get the closest point in the nav graph and its python binding
      [test] remove some clang warnings
      [nav_graph] Add a unit test for single_source_all_costs and fix an edge case
      Add an optional antenna in the robot model and use it for communication tests
      [test] Correction of a typo
      [python] Modification of the binding to allow calls with (x,y) or (x,y,z) points
      [python] update to allow the use of python3

Pierrick Koch (1):
      [python] classic import, remove relative