fix for forgotten URIencode when sending mails. Resulted in 404s for urls
containing special characters like '%'
adding test for URIencoding mail sender redirects
tests for the administration module
now loading groups and members in parallel in administration table
removed colorstore and management
Test was depending on today as date :(
Merge pull request #768 from leider/master

FIX forgotten URIencode / Testing Administration / Remove Colors