sfa-2.1-25

Setting tag sfa-2.1-25
sfi and sfaadmin list now share the same display code for related objs
support for advertising alternate api urls - for other API versions - api_versions.xml
cleaned up GID class
senslab: improved importer
senslab: add site to SlabLocation from Location
senslab: new class JsonPage
senslab:  fix debian packaging
federica: fix list_slices