admin: Add stats view

This view currently has a div that holds four URLs:

* data-astakos-stats: Simple stats for the astakos service
* data-cyclades-stats: Simple stats for the cyclades service
* data-astakos-stats-details: Verbose stats for astakos service
* data-cyclades-stats-details: Verbose stats for the cyclades service

Hit any of the above URL using as X-AUTH-TOKEN the token of the user,
will return a JSON with the above stats.
admin: Include stats view in tests
admin: Remove relic template
Merge branch 'feature-admin-stats' into feature-admin
admin-ui: Add e-mail validation
admin-ui: Minor JS fixes

* Remove all the debugging printings
* Update the text of notifications
admin-ui: Improve the info displayed in the notifications
Merge branch 'feature-admin-ui-demo' into feature-admin
admin: Separate project status from app status

Add application status in the table columns and add an "Application
Status" filter.

Fix apyrgio/synnefo#266
Merge branch 'feature-admin-project-status' into feature-admin
admin: Rename "deleted" term in associations

Use instead the "excluded" term, which is more broad.
admin: Add setting for showing only active members

Add ADMIN_SHOW_ONLY_ACTIVE_PROJECT_MEMBERS setting, which will limit the
associated users in the details page of a project by showing only the
ones that are accepted members of that project.
admin: Allow showing only active project members

Fix apyrgio/synnefo#243
Merge branch 'feature-admin-project-members' into feature-admin
admin-ui: Improve stats view
admin-ui: Always display Show/Hide selected btn
admin-ui: Change the style of 'Tips and Tricks'
admin-ui: Right align login submenu
Merge branch 'feature-admin-fixes' into feature-admin
admin: Refactor showing only accepted members