Don't run get_resolve_time tests on SQLite

SQLite doesn't do aggregate functions on datetime fields:
https://docs.djangoproject.com/en/1.7/ref/models/querysets/#aggregation-functions
Add notification to assignee on reassign (DMT #96377)
Merge pull request #136 from nikolas/fix-reassign-bug

Add notification to assignee on reassign (DMT #96377)
fix merge conflict
Merge branch 'nikolas-fix-get-resolve-time-tests'
Only disable notification checkbox if it's checked

We should always allow the user to manually opt-in to notifications on
action items.

Other JS fixes:
- notifications ajax request thing broke in this commit:
    9ca7808522b5ec1f778620168a467aecbd59d861
  and is fixed now

- The backbone apps are now loaded with main.js, since my JS
  re-organization broke that as well.
Merge pull request #137 from nikolas/allow-notification-opt-in

Only disable notification checkbox if it's checked