Added huffman decoder using prefix tree for HPACK encoding system with tests
Fixed styling issues and exposed Huffman Decoder class instead of singletons
Styling fixes.Taking square brackets to new lines
Merge branch 'master' of github.com:elricL/hyper into elricL-master
Tests should use binary strings.
Fixup some broken test strings.
Hex to bin works on unicode strings: don't need it.

The Huffman decoder will work on binary strings.
Move the removal of the binary prefix.
Docstrings for all.
Should return bytestrings.
Work with bytes, not text.