Bumped version number and added the contributors file

Fixed two niggling bugs:

* https://github.com/jamiecurle/django-writingfield/issues/5
* https://github.com/jamiecurle/django-writingfield/issues/6

Changes:

* Bumped the version number
* Added the contributors.md file

Backwards incompatible changes:

* If you'd been manually calling the plugin ( _which you shouldn't have had a need to_ ) like this `$('mytextarea').omfs()`, then now you'll need to called `$('mytextarea').djwf()`


And thanks to [Nippo][1] and [Karmak23][2] for the changes.  Especially [Karmak23][2] for the support for [django-grappelli][0]


[0]: https://github.com/sehmaschine/django-grappelli
[1]: https://github.com/nippo
[2]: https://github.com/Karmak23