Merge pull request #101 from FCStrike/master

BugFix: Prepare ui-router for login page
Merge pull request #102 from FCStrike/master

Add tags page with add/edit
HTML templates for login
Fix unsuspicious image
Merge pull request #103 from willwclo/login-temp

HTML templates for login
Fix image
Merge pull request #104 from willwclo/login-6

Fix image
Alert which emails are existing when inviting
Merge pull request #105 from jgho/inviteUsers

Alert which emails are existing when inviting
Default user categories and group invitees
Merge pull request #106 from jgho/categorizeUsers

Default user categories and group invitees
Remove outdated tag new controller and template
Change some naming on tags tpl to be more clear for admins
Add basic handling for survey on user account page
Add basic user server functionality