* Implemented a new block splitting algorithm which typically improves the
compression ratio slightly at all compression levels.
* The compressor now outputs each block using the cheapest type (dynamic
Huffman, static Huffman, or uncompressed).
* The gzip program has received an overhaul and now behaves more like the
standard version.
* Build system updates, including: some build options were changed and some
build options were removed, and the default 'make' target now includes the
gzip program as well as the library.