Issue #4767: Removed space that is inserted following the insertion of a mention
Moved mentionsInput.js from vendor/assets to lib/assets

The jquery.mentionsInput plugin upstream is no longer maintained.
Merge pull request #4775 from dash-rai/move-mentions-input-plugin

Moved jquery.mentionsInput plugin
Merge branch 'develop' of git://github.com/diaspora/diaspora into develop