• Implements h2-14 protocol (http://tools.ietf.org/html/draft-ietf-httpbis-http2-14)
• Implements HPACK 09 (http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-09)
• Depend on spdylay >= 1.3.2 for spdylay_session_set_stream_user_data
• Make sending trailer part easier with
  nghttp2_submit_request/nghttp2_submit_response using
  NGHTTP2_DATA_FLAG_NO_END_STREAM and nghttp2_submit_trailer()
• Refuse PUSH_PROMISE while unacked local ENABLE_PUSH is 0
• Remove thread_local check from configure, since we use pthread_*
  directly for now
• Fix -Werror=cast-align error on 32 bit platform
  Fixes GH-172
• tests: Use nghttp2_mem instead of raw malloc()/free()
  Fixes GH-170
• nghttpx: Support multiple HTTP/2 session per worker
  See --backend-http2-connections-per-worker option
• nghttpx: Support multiple -b option for HTTP/2 backend
• nghttpx: Disable acceptor temporarily when process runs out of fd
• nghttpx: Don't rewrite host for CONNECT method
• nghttpx: Attempt to improve HTTP/2 backend connection check
• nghttpx: Support trailer part for both h2 and h1
• nghttpx: replacing thread_local, which does not exist on OS X, with
  pthread_getspecific call
  (Patch from Stefan Eissing)
• nghttpx: Fix compile error without O_CLOEXEC
  (Patch from acesso)
• nghttpx: Fix broken server push after HTTP upgrade
• nghttpx: Fix crash when upgrading HTTP/2 failed
• nghttpd: Add --trailer to send trailer header fields
• nghttp: do not send pseudo-headers when in HTTP/1
  (Patch from Kazuho Oku)
• nghttp: Add --trailer optiont to send trailer header fields with -d
  option
• nghttp: Treat stream as success if we see END_STREAM from peer
• nghttpd: Fix bug that date header field value is not updated
• python: Fix bug push response header fields are not passed to
  callback
• asio: Rewrite server API, breaking ABI compat
• asio: Add client interface to libnghttp2_asio