Alphabetical sort and group resources by url

I added an alphabetical sort on the apis in the SwaggerResourcesView.

I also added the code for grouping resources by URL, as asked in pull request 17. 
I use the same settings but I changed the code so that it works with the current version of the master. 

As I needed that too, I also included the fork from WhiteDawn : Reworked swagger API Key to work with django-rest-framework's token authentication.