fixed auto-generated Component.slug.
fixed auto-generated Component.slug.

it now returns the filename of the component as default, rather than the
name of the class - which was almost always "backend" or "app".

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