FetchedResultsController: add optional arguments to the sql initializer (be consistent with the rest of the library)
FetchedResultsController: add optional arguments to the sql initializer (be consistent with the rest of the library)

groue/GRDB.swift,zmeyc/GRDB.swift,zmeyc/GRDB.swift,groue/GRDB.swift,zmeyc/GRDB.swift,groue/GRDB.swift,groue/GRDB.swift,zmeyc/GRDB.swift