Convert generated links back to source markup.
Remove generated markup for rfc2119 keywords.
Run tidy.
Change line length limit from 80 to 100 and run tidy.
Merge pull request #51 from mvano/RemoveGeneratedCode

Remove generated code and use 100 character line length
Rewrite abstract to mention service workers and remove non-normative refs.
Run tidy.
Address Peter's comments, mostly simplifying.
Run tidy.