added logs directory to gitignore
added logs directory to gitignore

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