FIX: Logout daemon, deleted import.
Human readable percentage evaluation comment.
Persist only included for SQLite.
Remove percentage limit for new assignments.

As the limit value for the percentage evaluation is not yet used, it is
probably better to spare the users from setting it (in vain).  Therefore it is
always implicitly defaulting to 0%.  Add a label for the selection as well,
while I am here.

Note that, despite it becomes a static selection this way, the Fay binding is
left there for now.  One could possibly remove this at a later occasion.

Also note that now it is possible to change the evalution type of an
assignment even there are submissions for it.  This option shall be disabled
after the first submission was submitted in order to maintain consistency.
However, apparently it does not cause any harm during the operation.
Submission download route, handler.
Add support for submitting zip files.
The evaluation type of assignment can be changed only when there is no submission for it.
FIX: Submission Type is printed for the View Assignment page.
FIX: Username of the submission is used at the rendering of the downloadable submission.
Update backend scripts.

- Switch default time zone for logging to UTC
- Adjust output result to the expectations of the frontend
Debug logger snaplet is created.
Logout is debug logged for investigation purposes.
FIX: If no handler is found for the path routing will pass the request through.
Merge branch 'master' into ui-bootstrap

Conflicts:
	src/Bead/View/Snap/Content/All.hs