implementations of hpack integers and huffman decoding
added licence headers
use buffers
implement huffman encoding
use bytebuffer array
simplified nbit integers
more tests
removed bad test
added prototype encoder decoder APIs
updated version to 10.0.0-SNAPSHOT
Merge remote-tracking branch 'origin' into jetty-http2
moved from test
Implemented parser and generator for DATA frame.
Implemented parser and generator for PRIORITY frame.
Implemented parser and generator for RST_STREAM frame.
Implemented parser and generator for PING frame.
Implemented parser and generator for GO_AWAY frame.
Implemented parser and generator for WINDOW_UPDATE frame.
Implemented parser and generator for SETTINGS frame.
Strengthened frame body length checks.