Add reemc repositories from pal-robotics

* pal-robotics/reemc_robot
* pal-robotics/reemc_simulation
Remove trailing spaces
Add general-purpose packages

* joy_teleop: a generic joystick interface to map analog sticks to topics and buttons to actions
* play_motion: a simple pre-recorded motion dispatcher for ros_control
Merge pull request #2730 from po1/patch-1

Add reemc repositories from pal-robotics