Importes now use logger.
Refactored order of constrution of objects in Db.
Moved index creation/removing from Db to Indexes.
Completed Garbage class.
Cleaner now calls garbage.clean() for databases.
Renamed List to ConcurrentList which better names it.
Implemented untested UniqueOrderedIndex.
Introduced TypeGroupEdge/Vertex into database.
Added Index capabilityes to PropertyFamily.
Added method for adding index.
Added method for removing index.