- Restores two-mixin approach to generating semantic grid columns (now with 'make-col-ready' and 'make-col')
- Removes need for .col-xs-12 by restoring the mass list of all grid tier classes to set position, min-height, and padding
- Adds an initial 'width: 100%' to flexbox grid column prep (later overridden by the column sizing in 'flex' shorthand or 'width') to prevent flexbox columns from collapsing in lower viewports

The example for column ordering still referenced the old push/pull class names.

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Clarify valid values of Carousel's `pause` option

Fixes #18205

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https://bugs.webkit.org/show_bug.cgi?id=159753

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Used zopfli 1.0.1 with `zopflipng.exe -m --lossy_transparent -y --iterations=1000`.

Before: 199 KB (203.922 bytes)
After:  197 KB (202.151 bytes)

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Refs https://bugzil.la/840640
Refs https://webkit.org/b/84635

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Changed `box-sizing: border` to `box-sizing: border-box`

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* bower.json, package.json: Extend jQuery version ranges to include v3
* NuGet: Bump jQuery to v3.0.0.1
* Docs+Examples: Update jQuery to v3.0.0
* Use jQuery v3.0.0 for JS unit tests
* Update jqueryVersionCheck to allow jQuery v3.x.x

Fixes #18813
Closes #20187

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Refs https://bugzilla.mozilla.org/show_bug.cgi?id=1282363

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Refs https://bugs.chromium.org/p/chromium/issues/detail?id=454172#c22

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Closes #20165

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Refs http://caniuse.com/#feat=css-nth-child-of
Refs https://drafts.csswg.org/selectors-4/#the-nth-child-pseudo
Refs https://crbug.com/304163
Refs https://bugzil.la/854148

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So remove its entry from the Wall.
Refs #20012, #20024
Refs http://trac.webkit.org/changeset/202324

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Refs #19990
Continues the degruntification process.

Also removes mq4-hover-shim for now,
since it doesn't yet implement the standard PostCSS plugin interface.

Refs https://bugs.chromium.org/p/chromium/issues/detail?id=273306#c34

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Refs #20005
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Fixes #17193: Remove mention and link to non-existant transitions plugin; that intro paragraph was two dupe sentences

Add Wall of Browser Bugs entries for #12832

So remove its entry from the Wall of Browser Bugs
Refs #15832

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Update Wall of Browser Bugs accordingly.
Refs #19670

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