Implement fix-permissions verb.

- Recursively change ownership of ROS HOME to current user.
 - Fixes: https://github.com/ros-infrastructure/rosdep/issues/332
https://pythonhosted.org/kitchen/unicode-frustrations.html

![Lie Down. Try Not To Cry. Cry A Lot.](http://i1.kym-cdn.com/entries/icons/original/000/012/073/7686178464_fdc8ea66c7.jpg "Lie Down. Try Not To Cry. Cry A Lot.")