classroom#show: Better assignment/exam selection.

This fixes #46.
Better classroom naming scheme.

Fixes #47.
Some work on fixing problems with TMI being given.

More needs to be done to implement this. (Working on #45)
Adding a link to the wiki.
Update version in file to match upcoming patch version.
Some whitespace tweaks.
Some more whitespace in the routes.
Starting on a new (original) favicon.
Adding more to the new favicon.
Copy over favicon_64 to favicon.
Remove the migration for the configuration creation.

Note that this may break things for some people, depending. You should
probably drop and re-migrate your database if you encounter any glitches
regarding the "configurations" table.
Remove associated rails configuration files.
Add more functionality to the classroom name function.
Use the better classroom name function introduced in 82f0497.
Use a better-fitting style for displaying members' names.
Merge pull request #52 from kotct/branch-v0.2.2

Merge branch "branch-v0.2.2" into master for release "0.2.2"