create signup controller
add signup model
annotate models
add specs for signup
fixes in signup and invites
fixed specs
show commit message in builds list, fixed ajax loader vivibility on builds and build page
Merge pull request #20 from vexor/sign_up

Sign up
ui fixes
restore github restrictions
fixed render_no_found for json format
 error "no implicit conversion of URI::HTTP into String" in UserRepo#unsubscribe_project
UserRepo#subscribe: yield new_project after subscribed
update travis build
UserRepoSerializer set subscribed to true when same name project exists
update README
sort jobs in build using natural number
update appBuildJobs test
update vx-builder gem
catch exceptions in BuildNotifier#create_commit_status