docs: update README

Merge pull request #6 from jimsch/update-tags

Add some text from the RFC Editor

Merge pull request #5 from jimsch/bug1

Fix problem with how HTML directory is set

Merge pull request #4 from jimsch/rfc7231

Return error counts

Merge pull request #6 from jimsch/master

Add retry testing
quote HTML from the errata file

Update version numbers

Merge pull request #5 from jimsch/master

CHange directory name

Merge pull request #3 from jimsch/master

Fix some problems with code pages

Clean up second change merges

change second chance encoding to be explicit.  Linux defaults to utf-8 while windows goes to iso-88591

Merge pull request #2 from jimsch/master

Fix distrbution code