fix spdy connection timeout issue
Merge pull request #417 from lingmingyb/spdyTimeout

fix spdy connection timeout issue
Remove duplication of protocols in MWS' NPN declaration.
Merge pull request #418 from square/jw/update-npn

Remove duplication of protocols in MWS' NPN declaration.
feedback from #413 and a few optimizations on hpack.
Merge pull request #415 from adriancole/bytestring-nits

feedback from #413
Lazy clone static table entries to avoid copying strings.
Merge pull request #419 from adriancole/hpack-lazy-clone

Lazy clone static table entries to avoid copying strings.