[ServiceWorker] Convert spec to bikeshed (#835)

I'm fairly confident about the accuracy of this conversion, but a few comments:
- (Obviously) I fixed all fatal errors bikeshed reported while processing the spec. This fixed a few links that were broken in the old spec (yay bikeshed checking internal links for validity)
- I ran the resulting HTML (at https://mkruisselbrink.github.io/ServiceWorker/spec/service_worker_1/) through the W3C link checker; all remaining errors there seem to be pretty benign.
  - In fixing these I discovered a number of broken links to concepts in html and/or fetch that need fixing. I filed bugs for some, and added all of them to the "Ignored Terms" section in the bikeshed metadata, which should make it relatively straight forward to figure out what things need fixing.
- I diffed the list of IDs defined by the bikeshed version with those in the pre-bikeshed version. A few things stand out from this:
  - sections that are auto-generated by bikeshed have different IDs (so #about, #dependencies and #introduction no longer exist)
  - the pre-bikeshed version had unique IDs auto-generated for every single paragraph in the spec (of the form "header-id.1", "header-id.2", etc. Bikeshed doesn't generate these IDs and thus these IDs no longer exist and any links to them would be broken. No idea if anybody actually linked directly to a specific paragraph. Fixing this would require implementing this functionality in bikeshed, but I personally don't think doing so is necessary/worth it.
- Some references now link to equivalent definitions in a different spec (e.g. before some worker references pointed to the w3c workers spec, while other pointed to whatwg html5. Now all point to the whatwg version. Some other references we pointed to the html5 spec pointing to some other spec, now those mostly point directly to the spec referenced by html5, maybe some more I forgot).
- Chrome has a bug (http://crbug.com/431867) which causes it to incorrectly render the `<th>` elements with the default bikeshed stylesheet (text is centered despite the stylesheet requiring left/start text-align). Really only a cosmetic issue with tables in the spec.
- Bikeshed has a bug (tabatkins/bikeshed#595) that results in bikeshed crashing on this spec. So you'll need to apply tabatkins/bikeshed#596 to actually be able to generate HTML.
- I think I'd prefer to just squash all these commits together and push the resulting commit rather than merging this pull request as is, since the individual commits aren't terribly meaningful (most of them result in bikeshed failing with fatal errors). 
- There is still room for improvement in how things are dealt with within the spec, but I think this conversion is good enough to replace the spec and any other improvements can be made later.

@jungkees not sure how carefully you want to review this/how much you trust I didn't make any mistakes; I guess let me know if/when you want me to merge this (squashed or not).
You can view, comment on, or merge this pull request online at:

  https://github.com/slightlyoff/ServiceWorker/pull/835

-- Commit Summary --

  * start of bikeshed conversion
  * Clean up IDL and references to local IDL types/methods/attributes.
  * fix up external references
  * Several fixes of stuff I missed.
  * Fix last few fatal errors by properly defining and referencing local terms.
  * Minor cleanups.
  * Fix indentation in a couple of places.
  * Re-enabled biblio shorthands so links to sections can be added.
  * Fix some links and add table class=data.
  * Add IDs to <pre> elements for types that only have an auto-generated ID.
  * add example class to sample idl snippets
  * Slight simplification in fetch references.
  * Also update nightly version of the spec.
  * Fix typos resulting in broken links.

-- File Changes --

    A spec/service_worker/index.bs (3931)
    M spec/service_worker/index.html (8810)
    A spec/service_worker_1/index.bs (3930)
    M spec/service_worker_1/index.html (8806)

-- Patch Links --

https://github.com/slightlyoff/ServiceWorker/pull/835.patch
https://github.com/slightlyoff/ServiceWorker/pull/835.diff

---
Reply to this email directly or view it on GitHub:
https://github.com/slightlyoff/ServiceWorker/pull/835