fix PackedTokenAttributeImpl as TypeAttribute; reorg Field/TextField/StringField
implement FreqProxTermsWriterPerField.writeProx()
implement BytesRefHash.rehash()
implement PostingsBytesStartArray.grow()
implement ParallelPostingsArray.grow()
implement BytesRefHash.euqlas()
implement BytesRefHash.findHash()
implement FreqProxPostingsArray.copyTo()
implement deadloop
implement ParallelPostingsArray.newInstance(), fix deadloop
implement PerField.finish()
implement Field.tokenStreamForReader()
implement Tokenizer.setReader(); fix index out of bound issue
remove dead code
implement Lucene49NormsFormat.normsConsumer()
implement LZ4HashTable.reset()
fix tokenizer from reader
prefer RuneReader instead ReadCloser
fix RuneReader
implement TermsHashPerField.add()