Fixes #242
Make email readonly and mark short messages as read
Woops!
Admins should no longer be able to edit emails too

AdminPowers--
Fixed icon
Fixes statics
Merge pull request #257 from boersmamarcel/fixstyling

Switched the message icon active state.
Limits the amount of emails marked as autoread :-)
Merge pull request #256 from boersmamarcel/fixmailmessage

Fixmailmessage
Changes google javascript
Images from png to jpg
Merge pull request #258 from boersmamarcel/static

Fixes statics
Adds a first meeting time field

(warning: existing challenges will throw an error due to a missing
start time)
Made dashboard overviews link to the full list, show active filter in list
Merge pull request #260 from boersmamarcel/addlinks

Made dashboard overviews link to the full list, show active filter in list
Surprise incoming
Adds two tests
Adds some additional tests for other features
Adds default value and updates existing challenges
Removes useless tag :-)

Woops.