Better support for static files of plugins

[dyve]

Thanks for a great app!

In leaflet/__init__.py, this statement:

urls[i] = urljoin(settings.STATIC_URL, url)

does not take the settings for Django's static files backend into account. This means md5 hashes, S3 storage, etc. will all cause the plugins to fail.

A solution would be to have Django static files generate the url, and replace the code above with:

from django.contrib.staticfiles.templatetags.staticfiles import static
urls[i] = static(url)

See also: http://stackoverflow.com/questions/11721818/django-get-the-static-files-url-in-view

I could do a pull request, but since it's only one line I figured this was the fastest solution with a proper explanation of the problem. I hope you can use this.

[leplatrem]

Thanks @dyve for the compliments !

This looks like a very relevant point !

Could you please a pull-request instead ? Add your name to contributors and changelog ?
It would be a lot less effort to integrate your fix :)

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We would welcome any help for maintaining this library. If you use it and find it useful, please Watch it on Github, help us review contributions or comment issues :) Thousand thanks in advance.