[nao_pose] Add a parser for Choregraphe XAP posture libraries
[nao_pose] Added support for Choregraphe's XAP posture library

This allows a user to create Nao posture from Choregraphe, export them to XAP files
and load them in the pose library for later invokation with body_pose action.
Merge pull request #6 from severin-lemaignan/more_poses

[nao_pose] Add support for Choregraphe XAP posture librairies in pose_manager