Todo

• Thread safety. Both of these are problems
  • OffsetNibbleHuffmanCompressionModel.encoder
  • OffsetNibbleHuffmanModel.state
• Java JNI interface to native
• Make system
• Clean out experimental java stuff
• Make sure c++ based unit tests have all cases from java side.
• Performance
  • PrefixHash dynamic memory is killing us on compression vs gzip (see Instruments.app)
  • stream overhead in BitInput/Output is notable. No need for streams since outer layers assume buffer/length.