Simplify stream priority.
fixing typos
Merge pull request #455 from ZumZoom/typo-fix

fixing typos
add missing 'to'
Merge pull request #459 from phluid61/copy-editing

add missing "to" in WINDOW_UPDATE
reinstitute per-DATA compression
Editorial fix
More editorial fix
Merge pull request #461 from summerwind/editorial-fix

Editorial fix
fix broken xrefs
move error text from setting to flag
Cleaning up whitespace and indentation.
Adding first pass for BLOCKED frame.
Adding warning regarding BLOCKED
Cleaning up ALTSVC frame description.
Updating GOAWAY to allow for multiple sending, editorial cleanup of same.
Adding more BLOCKED references.
Editorial tweak to last
Adding implementation note.
Adding tree+weight prioritization change.