cleaned up and documented manager.py, to accomodate webui changes
cleaned up and documented manager.py, to accomodate webui changes

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