Reclassify references, make IANA considerations consistent
add ref for host header field, reduce SNI references
remove unused files
Minor travis tweaks
Adding -lc suffix and last call note
Adding PUSH_PROMISE to DoS considerations as only excemption from state bounding
Making a final pass over the document for editorial consistency.
Whitespace cleanup
Adding new security considerations around the use of the header table
Expanding text on detection