Test all database backends with Django 1.6 and keep 1.5 just for
compatibility tests.

There are too big differences between 1.4 and 1.6 to maintain full
compatibility with both of them.

We will never use more profiles for user.

We don't have to be perfect, just strip anything what looks like an
email address.

Maybe this happens just when too much is pushed, but checking repo
regardless branch seems to be right option in this case.

Fixes #408

Thanks to Greg Roach

Currently translated at 68.9% (662 of 960)

Currently translated at 65.3% (627 of 960)

Currently translated at 100.0% (13 of 13)

Currently translated at 100.0% (960 of 960)

Currently translated at 60.7% (583 of 960)

Currently translated at 100.0% (960 of 960)