typos and trivial copy-editing
Merge pull request #83 from phluid61/master

obvious typos and simple copy-editing fixes
Corrected client implementation for push.
s/session/connection/g
Clarifying stream use.  Closes #69.
Removing confused statement on RST_STREAM for closed streams.  Closes #74.
Merging #82.
Merging #84.
XML errors introduced by 5ad9395659
Merge pull request #85 from phluid61/master

Fix XML errors introduced by 5ad9395659
Working on clarifying GOAWAY (#63).
Merge branch 'master' of github.com:http2/http2-spec
Fixing some of the messed up settings stuff.
Merge remote-tracking branch 'http2-spec/master'
typos