Mysociety-django-select2

* Fixed issue[20](https://github.com/applegrew/django-select2/issues/20). Infact while fixing that I realised that heavy components do not need the help of cookies, infact due to a logic error in previous code the cookies were not being used anyway. Now Django Select2 does not use cookies etc.
* Few more bugs fixed in `heav_data.js`.
* Now production code will use minimized versions of js and css files.
* Codes added in `setup.py` to automate the task of minimizing js and css files, using a web service.

* Merged pull request (issue[17](https://github.com/applegrew/django-select2/issues/17)). Which allows the user to pass some extra data to Select2 clients-side component.
* Updated License. The previous one was inadequently worded. Now this project use Apache 2.0 license.

* Manually merged changes from pull request (issue[16](https://github.com/applegrew/django-select2/issues/16)).
* Django Select2 widgets now allow passing of any Select2 Js options. Previously it used to allow only white-listed options. Now it will block only black-listed options. For example, Light Select2 widgets won't allow you to set `multiple` option, since it is an error to set them when Select2 Js is bound to `<select>` fields.

* Addressed enhancement issue[12](https://github.com/applegrew/django-select2/issues/12).
* Addressed enhancement issue[11](https://github.com/applegrew/django-select2/issues/11).
* Addressed performance issue[8](https://github.com/applegrew/django-select2/issues/8).

* Fixed issue[7](https://github.com/applegrew/django-select2/issues/7).

* Bumping up minor version since Select2 JS has been updated to version 3.2. It seems Select2 JS now includes new higher resolution icons for [Retina displays](http://en.wikipedia.org/wiki/Retina_Display).
* Fixed an issue in `setup.py` because of which `templatetags` directory was not included in last PIP releases' tar file.