Adding institutions
Managing institutions
See institution users
Tests for institution and new methods
Better institution users pages
Port invitesifrom tokeninput to new select2
Tokeninput for institutions on register screen
Using select2 for signup institution form
Tests for correct duplicate institution
Interface for 'correct_duplicate' institution
New screen for editing institution permissions and setting admin rights
More adjustments in news and join requests

Added tests and reviewed abilities, specially.
There's still things to be improved and a lot of tests to be added. Included
a few TODOs for some of these things.

refs #790
Added institution to a space and setting it via space creator
Users now await for approval of the global admin
More tests WIP
New tests for InstitutionsController
Institutional admins can manage users and spaces in their institution
Added buttons and permissions for admins to approve users
User permissions on manage screen, and details on profile
Sending a message to the institutional admins when user register

Also a more prominent visual notification of unapproved users for the
admins.