pullrequest: notifying new pullrequest
pullrequest: added watch/unwatch button
pullrequest: notifying new simple-comment

* for now, it just notify new simple-comment on the pullrequest
pullreuqest: notifying pullreuqest state change
pullrequest: updated watching menu
pullrequest: added diff view
Merge pull request #152 from whiteship/yobi refs/heads/pullrequest/noti
issue: Use number instead of id.
Remove Content Search feature not used.
hotfix - none display readme file at project overview