Conflicts:
	docs/assets/css/pack.min.css

Per https://github.com/twbs/bootstrap/issues/11087#issuecomment-32309827
Thanks @admc & @saucelabs !

move Community & Translations docs sections from About to Getting Started

add link to Sass CONTRIBUTING file in the About page

because they're only really featured on javascript.html
Replacement: input groups

Set Jekyll encoding and tweak Windows notes

Conflicts:
	docs/components.html
	docs/css.html

clarify docs regarding non-mixable components

callout severity tweaks

Conflicts:
	docs/assets/js/customize.min.js

Per https://github.com/eligrey/Blob.js/pull/20
& https://github.com/eligrey/FileSaver.js/pull/63
The library author has deemed the existing /*! @source URL */ comments to be
sufficient attribution, and these already survive minification.

Refs ea591748

tests: run BrowserStack in parallel with Sauce Labs

more detailed QUnit test results in Sauce

Conflicts:
	docs/_includes/old-bs-docs.html

Don't copy-pasta all the Sass docs because fuck keeping that up to date. Instead, point to https://github.com/twbs/bootstrap-sass/blob/master/README.md.

Per https://github.com/twbs/bootstrap/issues/11087#issuecomment-31922999
and internal twbs team discussion.
Effectively reverts the deletions from #11701.