Django-verify-email

**Bug Fixes:**
* Variable name in view function was different than the one passed in URL

**Enhancement:**
* Raising `Http404` instead of returning 404 with a string so we can have the default 404 page
* Using python's logging system instead of print statements

**Thanks to sebastianhaas**

**Bug Fixes:**
* Using normal form instead of model forms to allow unique emails to re-request verification email
* Not returning HTTP response in one of the exception blocks

**Enhancements:**
* Added new settings variable `NEW_EMAIL_SENT_TEMPLATE` to configure template shown after successful email sent.
* Using `get_username()` method to account for apps that have changed the USERNAME_FIELD of their user model
* migrations updated according to Django 4.x

**Thanks to:** javier-a-agustin, grmoon, sebastianhaas