docstring
changes to travis, seems we have to call setup.py with "develop" now
Also new travis hassle around gpg keys
apt-get update seems to take too long
Merge pull request #63 from tkruse/travis_fix

Travis fix
code style prefer member var to global
rosws info: adds --untracked option

SCM status field would show M if there are untracked files and no other
changes.
nicer description
Merge pull request #65 from tkruse/info_untracked

Info untracked