Django-boilerplate

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- Fix: Mixin CreateModelMixin
- Improvement: No loger convert template tags to titles

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- Fix: PIL as new requirement
- Fix: Requirements
- Fix: Python3 compatibility

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- Added: `add_view_permissions`: Create a post migrate signal to add a new view permission to all the model
- Added: `ModelImageThumbs`, and automatically create thumbnails from the images that you upload.

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- Fix: Forgot to import translation at `views.py`.

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- Rename: `views.py` to `mixins.py` because is the propper name
- Add: `boilerplate.py` with the default settings, you can customize your error messages.
- Add: `forms.py` Forms with validation to the following Views:
- Add: `views.py`: `LoginView`
- Add: `views.py`: `RecoverAccountView`
- Add: `views.py`: `RegistrationView`
- Add: `views.py`: `LoginView`

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- Fix: CRUD Messages Mixin conflict with Extra Forms and Formsets Mixin
- Fix: ExtraFormsandFormsetsMixin validate if `formset_list` or `extra_form_list` exists
- Fix: App template tags, didn't got the model information intead of the app information