Added oid of postgis2 geometry
Unknown oids are now mapped to PersistDbSpecific instead of throwing error.
Explicit map of extension types to PersistentDbSpecific using typenames instead of oids since these are not stable across databases for extension types
remove hardcoded oids for postgis
Merge branch 'upgrade-hspec'
Merge pull request #313 from meteogrid/master

Added oid of postgis2 geometry