Models for invitation
Started invitation dialog popup
Merge branch 'feature/users-listing-and-invite'

Conflicts:
	projects/static/js/users.js
	projects/templates/users/get.html
Typo in the sample random names
Less strict dependencies.
Disable restful error handler that is still in development and causes issues.
Add mock email backend when in developement.
Fixes in vagrant bootstrap. Enabled autodependencies updates on each vagrant boot.
Added notes about the specific .env behaviour
Optimised the way SASS is compiled and served.
Added notes about master branch