refactor timtecuser to the accounts app
move templates and tests to the accounts app
move the rest test files
unify lesson and core.
Merge branch 'master' into uber-refactor
new fixtures for refactored models
adds admin to the group professors
runs jshint tests with all_tests
refactoring models Activity and Answer into a new django app
fixing json after refactoring
Merge branch 'master' into uber-refactor

Conflicts:
	core/static/js/lesson.js