handle unicode in http backend
handle unicode in http backend

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