Typo
FINAL flag clarification and two other minor edits...
Editorial cleanup of frame definitions, few additional tweaks.
TODO: Need clarification on what frames are allowed to initialize
streams. Is it all frames or just header bearing frames? This issue
needs resolved before making a pull request
Additional tweaks.. preparing for new pull request
must ignore for unknown settings
Revised edits
s/session/connection/g
Clarifying stream use.  Closes #69.
Removing confused statement on RST_STREAM for closed streams.  Closes #74.
Merging #82.