Fix unclear sentence fragment
Update the processing equivalence for Registration algorithm
Correct punctuation
Smattering of small tweaks

* Added a missing "the"
* Made method call order consistent between two related code examples
Change interface name: NavigatorServiceWorker to ServiceWorkerContainer https://github.com/slightlyoff/ServiceWorker/issues/176
...
Update the processing model of the registration algorithm to return the Promise synchronously.
Extend the concepts to cover more of the terminology in use throught the spec.
Merge pull request #178 from brettcannon/patch-1

Smattering of small tweaks
Merge pull request #175 from mattto/patch-1

Fix unclear sentence fragment
Define lifecycle events, functional events, and describe the worker-in-waiting state.
Ref #functional-events
Ref the spec.
Ref a URL for the spec that will render in a browser.
Trying to clarify installation prose. Unsure we even need the service-worker-lifecycle section.
Move the bug tracker to GH issues
rename caching section
Nuking the lifecycle section per discussion with @junkees
Move concepts into its own section per discussion with @junkees.
Update the processing equivalence for Upgrade algorithm