Merge pull request #103 from toolness/theme-framework

Added a rudimentary theming system.
Moved all webmaker-specific stuff into themes/webmaker/.

It's not really a proper theme because I just copied all public
views in there. Had to do this b/c it was difficult to separate out
what was webmaker-specific from what wasn't, especially since the
webmaker css uses its own grid system and such. Alas, we'll have to go
back later and fix things up.

Now the public views just use generic ol' bootstrap, but are thus
in prime condition for theming.