django-static mixing up urls and system file paths for windows machine.

[akamad]

While using django-static on windows machine I found that the new filenames that were being created had a "" instead of a "/" in their src.
eg.href="/media/css\login_foo_moo_too.css"

instead of
href="/media/css/login_foo_moo_too.css"

This issue was happening because on the windows machine django-static was mixing the system path of the file and the url associated with it.

[GeraldXv]

Add this after line 551: this_filename = os.path.normpath(this_filename).replace('\\','/')