Add Makefile target that finds the last exception raised by a request.

This is totally what Makefiles were meant for.
Display revision and WIP status on Moffle brand hover.
Add ADVANCED SEARCH modal and expose search-by-author.
Merge branch 'master' of https://github.com/nattofriends/moffle
Merge pull request #7 from nol888/master

Swaggify the things.