email: wip add composer, mustache, swiftmailer.

* Email class.
* Email helper class.
unreadModel php tested and working
moved UserList_ProjectModel and UserModelMongoMapper to their own files so the autoloader can work
added unread property to activitylistdto (and updated tests)
fixed angular activity page to accommodate new dto structure
email: wip Twig templates and SwiftMailer

* Removed mustache, no longer used.
* Tests for signup content with validation key.
* Mock swift mailer.
email: wip Pass in userModel instead of id.  Tweak email server settings.
activity feed UI now shows unread activity items
email: Fix sf.php

* Add composer auto load
Merge branch 'feature/email'
downloaded font awesome as a local resource (not dependent on the Internet)
unread comments/answers implemented in question page
added multi-model, multi-command tests for UserUnreadModel(s)
Merge remote-tracking branch 'origin/master' into feature/unread
build: Update build to run composer to install dependencies.
Fixed UserList_ProjectModel and UserModelMongoMapper move.
updated pencil design for User and Project Dashboard
fixed indexOf console error on question page regarding undefined rights variable
Remove php dependencies from repository.

* Devs should use composer install to install dependencies.
Fix #59 upload texts

* Disabled textdrop directive which was interfering with uploading of texts (and questions).