Add PosVel and PosVelAcc interfaces.
Add inline keyword to free header functions
Merge pull request #183 from pal-robotics/joint-limits-interface-inline

Add inline keyword to free header functions
Merge pull request #181 from ipa-mdl/pos_vel_acc

Rebased  #148 (Added pos+vel and pos+vel+acc command interfaces)
controller_manager: spawner: adding shutdown timeout to prevent deadlocks
spawner: fixing shutdown message
spawner: changing language
Merge pull request #185 from pal-robotics/fwd-port-161

Indigo port of #161
added readyForSwitch
readyForSwitch
better name for function
no need for protected - keep as was before
Merge branch 'support_hwinterface_switching' of github.com:ipa-fxm/ros_control into support_hwinterface_switching