fixes bug 858247 - Rate limiter on the public API
Added a commend about using the RatelimitMiddleware in case we ever decided to ratelimit other views.
fixes bug 866810 - favicon in django, r=lauraxt
bug 868882 - don't pass the version to the middleware if it's "ALL:ALL"
Merge branch 'master' into bug868882-report-list-all
Merge branch 'bug868882-report-list-all' of github.com:jezdez/socorro-crashstats into bug868882-report-list-all