issue #364: spdy should set content-length when it is known.
Merge pull request #365 from adriancole/spdy-post-content-length

set content-length on spdy post
Adjust hpack impl to be compliant with draft 3 examples, and enable http2 in MWS.
Merge pull request #366 from adriancole/fix-hpack

MockWebServer can now read headers sent by http2 clients
Support PATCH requests in MockWebServer
Merge pull request #368 from nacx/mock-patch

Support PATCH requests in MockWebServer
Merge pull request #1 from square/master

sync from square