Adding school-of-ed to the list of invalid usernames.
Revert "Redirecting /username or /locale/username to /locale/people/username."

This reverts commit 7c4154015f2399cd3b70e0eeffb4bd95add70d88.

Conflicts:

	lernanta/apps/drumbeat/middleware.py
	lernanta/apps/drumbeat/tests.py
Merge branch 'master' of github.com:p2pu/lernanta
Not removing individual scripts until docs are updated.
Adding check_code section to Makefile (to run pep8 and pyflakes).
Updating spanish translation.
Limit view of course metrics CSV to only superusers and Karen
Cleanup from merge/move of lernanta files.
Started detailed csv export for just superuser and certain users.
Added last_active and deleted mockup code for organizer quick view
Moved csv mockup to export_detailed_csv
Making Sqlite default db bakend for development.
Saved start of getting users' comment counts for course
Removing javascript error related to farbtastic.
ASCIIMathML support for UCIrvine courses (and any math group/course on p2pu).

* http://www.wjagray.co.uk/maths/ASCIIMathTutorial.html
Added lernanta sqlite db to .gitignore
Added time on page
Tweak to CSS for hints on organizer quick view tab
Updated language files
Added more information about how time on a page is calculated