fixed back button
fix bug with service function.
moving authentication into home controller logic.
remove unnecessary restriction.
default routing logic.
Merge pull request #26 from Transformapp/login

Login
merge from master.
Pull in user's name and profile picture from Facebook upon authentication
updated the back button code to put them closer to each other.
update the link url to depend on ui-router rather than hardcode it.
Merge pull request #27 from Transformapp/login

Pull in user's name and profile picture from Facebook
Correctly handle error cases.
Merge branch 'master' of github.com:Transformapp/webapp into login
Merge branch 'master' of github.com:Transformapp/webapp into feature-back-button
Merge pull request #24 from Transformapp/feature-back-button

fixed back button
Merge branch 'master' of github.com:Transformapp/webapp into group-details
only set it in service call, rather in toObject()