add build status mail template
add human_status_name
rename build and job status finished to passed
Build#status_has_changed? return true is prev build is nil
fixed specs
fixed Build#human_status_name
rename *complted* to *finished* in Build
change order of conditions in Build#human_build_status
add model ProjectSubscription
add ProjectSubscription#subscribe_by_email
subscribe author to repo in BuildFetcher
fetch build in BuildFetcher
add module PublicUrl
delivery email notifications in BuildNotifier
typo in BuildFetcher
remove unused BuildStatusSerializer
add :subscribed to ProjectSerializer
create controller api/project_subscribtions, add subscribe and unsubscribe methods to Project
complete api/project_subscribtions controller
update Build#human_status_name