Merge pull request #45 from alekstorm/h2-10

Merge `development` into `h2-10`
Correct the stream flow control windows.
Document improved window size.
Add new lines.
Add universal wheels.
Change byte pattern to match HPACK-7.
Encoding context updates.
Fixup the static table.
Update the Huffman constants.
Update Huffman tests.
Syntax error.
Skip invalid HPACK tests.
Unbound local variable.
Reply to PINGs with PING+ACK
Merge pull request #48 from alekstorm/ping-reply

Reply to PINGs with PING+ACK
Propagate the name length correctly.
Update smaller tests to match spec.
Fixup the remaining Huffman tests.
Fixup broken header continuation test.
Update nghttp2 tests to HPACK07.