basis.date: remove extProto support, replace throw with warnings
basis.date: remove extProto support, replace throw with warnings

basisjs/basisjs,smelukov/basisjs,smelukov/basisjs,fateevv/basisjs,basisjs/basisjs,fateevv/basisjs,tyanas/basisjs,smelukov/basisjs,istrel/basisjs,istrel/basisjs,istrel/basisjs,fateevv/basisjs,tyanas/basisjs,tyanas/basisjs,basisjs/basisjs