Some minor improvements to navigation and venue display.

Conflicts:
	controllers/venues.py
Minor fixes.
Switched to using emails as user identification.

Conflicts:
	controllers/submission.py
Some cleanup.

Conflicts:
	controllers/venues.py
Changed the default of the number of submissions.
Fixed some smaller bugs.
Fixed email -> user in submission.py
Fixed feedback.py for email -> user.
Small fixes.
Some small fixes.
Some other minor fixes.
Better presentation of review accept form.
Fixed 1: :1 error in rating.py
Removed the comment table.
Fixed some of the code after the transition.
Simplified the venues.
Committed some changes to the rep system.
Added bogosity of reviews.
Some improvements to view of comparisons.
Improved the presentation of tasks and comparisons.