Merge pull request #1 from nilsbore/master

[strands_movebase] Pull the 3d obstacle avoidance out of scitos_2d_navigation and calibrate_chest out of scitos_common. Looking good...
Merge pull request #3 from nilsbore/strands_description

[strands_description] Split chest camera state publishing out of scitos_description. This works well on Rosie, it should be very transparent to all the other packages.
Update README.md