Regenerated the huffman tables with EOS frequency of zero. We will
likely need to regenerated the tables again, potentially
removing EOS (or assigning EOS an appropriate value
              duplicating another 8 bit long entry) as per issue #287.
Made huffman coding optional #284.
Clarified eviction when referencing name, fixing #283 and fixing #281.
Merge branch 'master' of github.com:http2/http2-spec
Merge branch 'master' into integermax