added diet_read function which does not create a frame index and preserves memory
added diet_read function which does not create a frame index and preserves memory

BerlinUnited/NaoTH,BerlinUnited/NaoTH,BerlinUnited/NaoTH,BerlinUnited/NaoTH,BerlinUnited/NaoTH,BerlinUnited/NaoTH,BerlinUnited/NaoTH