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

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