WIP: huffman tree construction and lookup
Works, is ugly
decodeLiteral includes huffman decoding
Minor cleanup of decodeHuffman logic
Add coverage for header example from HPACK IETF Appendix D.4

IETF-07 for hpack appears to have an incorrect huffman decoding
(custom-valu rather than custom-value)
WIP: EOS padding to next octet, not to a 32 bit int
Fix decoding sometimes exiting loop early
Code cleanup, fix comments
A TODO that will probably never be TODOne
Merge pull request #8 from tildedave/huffman_decoding

Huffman decoding