disable karma crap and enable grunt watch
add account directive and account provider classes
get account info route in backend
account service, load user account
user model
added username and logout button into navbar
Revert "disable karma crap and enable grunt watch"

This reverts commit d5c2331a8e1c57d48741f536536eea165c219d6d.
fixed review issues
renamed variables in user model
Merge pull request #43 from songster-project/feature/logout

I merge it, even if we have this security issue here!