add travis status image to README
Merge pull request #7 from ctorstens/master

add status image to README
added signup route; also fixed arch finally
fixed user signup redirect
added session creation on signup
users can login, sign up, have session[:id]
added session helpers
cleaned up controllers
cleaned up controllers again
redirect to signup on fail
corrected typo in users conroller
added sextant for routes
Merge branch 'master' into add_voting