added "request" var to context in {% region %}s
added "request" var to context in {% region %}s

this has nothing to do with the surrounding commits. it's just been
hanging around in my working dir for a long time. it allows regions
to inspect the HttpRequest object for querystrings, cookies, etc.

ehealthafrica-ci/rapidsms,lsgunth/rapidsms,peterayeni/rapidsms,peterayeni/rapidsms,caktus/rapidsms,ehealthafrica-ci/rapidsms,dimagi/rapidsms,unicefuganda/edtrac,unicefuganda/edtrac,peterayeni/rapidsms,peterayeni/rapidsms,catalpainternational/rapidsms,caktus/rapidsms,lsgunth/rapidsms,catalpainternational/rapidsms,eHealthAfrica/rapidsms,catalpainternational/rapidsms,lsgunth/rapidsms,catalpainternational/rapidsms,ehealthafrica-ci/rapidsms,ken-muturi/rapidsms,dimagi/rapidsms,eHealthAfrica/rapidsms,ken-muturi/rapidsms,unicefuganda/edtrac,ken-muturi/rapidsms,caktus/rapidsms,lsgunth/rapidsms,eHealthAfrica/rapidsms