removed JSON serialization from App. never made much sense.
removed JSON serialization from App. never made much sense.

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