font-compression-reference project updates

To quick updates for the reference project.

The compression tool and wiki have been updated, for more robust runs of
the tool:
https://code.google.com/p/font-compression-reference/wiki/gathering_compression_improvement_numbers

The entire process for building the Java LZMA compression library from
source have been documented:
https://code.google.com/p/font-compression-reference/wiki/lzma_compression_library