A large number of editorial changes; changed the description of dropping/adding new entries.
Removed more references to substitution indexing
Changed 'initial headers' to 'static headers', as per issue #258
Merged 'request' and 'response' static headers, as per issue #259
Changed text to indicate that new headers are added at index 0 and expire from the largest index, as per issue #233
Further clarifications to how eviction works #238
Merge branch 'master' of https://github.com/http2/http2-spec
Fixed conflicts.
Merge branch 'master' of https://github.com/http2/http2-spec
fixed off-by-one error w.r.t. indexing into the static table.
More cleanups.
Various small cleanups.
Merge branch 'master' of https://github.com/http2/http2-spec