add a get_frame method in the Move object returning the given frame at time step "n"
add indentation to the json saved file
Merge pull request #1 from poppy-project/master

Handle non detected motors
Merge branch 'master' into get_specific_move_frame
change name of the parameter in the method Move.get_frame()
Merge branch 'get_specific_move_frame' into master-matthieu
Makes the get frame through []
Merge pull request #15 from poppy-project/master-matthieu

Add a get operator in the Move object