Simplify list of file a lot and document the role of the different files.
Simplify list of file a lot and document the role of the different files.

humanoid-path-planner/hpp-doc,jmirabel/hpp-doc,laas/hpp-doc,florent-lamiraux/hpp-doc,florent-lamiraux/hpp-doc,jmirabel/hpp-doc,laas/hpp-doc,humanoid-path-planner/hpp-doc