Allows to alert only the commit author when a new note is added on a commit, useful when gitlabhq is used for code
reviews, allows less noise with mails...

This reverts commit f80745b7.

Removes destroy callback for users_projects when a project is destroyed.
This works okay becaues the gitolite config will be updated at at the
end to remove the entry entirely, thereby removing the users anyway.

you across projects.

This shows issues assigned to you, across all your projects, in one
place.

References #173