Huffman encoding test.

.../azgracompress/benchmark/ScalarQuantizationBenchmark.java

...azgracompress/compression/CompressorDecompressorBase.java

...ain/java/azgracompress/compression/SQImageCompressor.java

src/main/java/azgracompress/huffman/Huffman.java

src/main/java/azgracompress/io/OutBitStream.java

...press/quantization/scalar/ScalarQuantizationCodebook.java

...va/azgracompress/quantization/scalar/ScalarQuantizer.java