Support S3 static files storage

[jnm]

Hello,

This lets django-leaflet work in an "advanced use case such as using a cloud service to serve static files," as described in https://docs.djangoproject.com/en/dev/ref/templates/builtins/#static.

Thanks for your consideration.

[leplatrem]

Shouldn't we add this as a footnote for the very few users still running Django < 1.3 only ?

[jnm]

Sure, should I make a new section called "Footnotes"? This INSTALLED_APPS issue is actually part of why the Travis tests are failing. This does not match the defaults for recent version of Django: https://github.com/makinacorpus/django-leaflet/blob/master/quicktest.py#L22.

[leplatrem]

Thanks for the contribution !
The test suite fails with recent versions of Django. Could you please have a look ?

[leplatrem]

@jnm Any news ?

[jnm]

@leplatrem, I just had a look at this. There are at least two problems. One is that INSTALLED_APPS in quicktest.py does not contain 'django.contrib.staticfiles'. That's easy, but once corrected, Django complains about STATIC_URL not being defined. If I define it, test_all_resources(), test_default_resources(), and test_explicit_resources() all fail due to STATIC_URL being prepended to the paths. STATIC_URL = '' unfortunately does not satisfy Django.

I'm out of time to work on this today, but perhaps I could resume later in the week.

[leplatrem]

Ok, I pushed an updated of the tests and project setup.
Just rebase or merge your branch with current master, and see if it fixes the testing suite :)

Thanks for pointing this out :)

[jnm]

Woohoo!

[leplatrem]

Perfect, thanks !