Django-vitevue

Feature release:

- Simplify and improve the `postForm` method
- Add a Django view to handle posting forms on the backend
- Add the `notify` method

**Warning**: API change on the `postForm` method

Feature release: add the `check_csrf` helper method for form views and add an example in the doc

Feature release:

- Add the `isInactive` method
- Use custom delimiters: `{! variable !}`