Released version 0.4 of django-userprofiles.

* Added more tests
* Fixed datetime/timezone errors
* Refactored views to use class based views
* Added explicit setting to enable emailverifications

Merge branch 'release/0.4'
Raise a HTTP 404 if a emailverification verify request is invalid (wrong token, code, ...)
Expire all former EmailVerification requests once a new is stored.
Add missing 404.html for Django<1.5
Restructured testing stuff.
Fixed a bug with late-loading of settings in the tests.
Merge branch 'master' of git://github.com/Markush2010/django-userprofiles into develop
Improved the way how invalid email verifications are handled.
Extended the tox config to test against Django 1.4 too.