* Drop -x and -y as they're all the same
- Also move -width to elsewhere in the vars because it makes no sense by spacers.
- Update values of -x and -y across main Sass and docs Sass.
* Update docs to reflect changes; link to spacing utils from options page
* Get this party started by removing mention of Normalize.css
* Nuke the old comment, consolidate to a single line and number as appropriate
* Bring over styles for HTML element from Normalize to Reboot
* Move margin override for body element from Normalize to Reboot
* Drop the block reset for HTML5 elements in IE9- from Normalize given we dropped IE9 support
* Building on previous commit, do the same thing for figure, figcaption, and main
* Remove IE9- display from Normalize given our browser support
* Drop IE8 figure margin because we're IE10+
* No need for the h1 overrides because we reset these font and margin styles anyway in _type.scss already
* Drop Safari 6 b and strong normalization because we're Safari 8+
* Remove mark styles for IE9- from Normalize
* Remove old iOS audio fixes from Normalize
* Remove IE9- display for progress from Normalize
* Remove more IE9- rules from Normalize
* One more IE9- display removal for canvas element
* Move pre overrides from Normalize to Reboot
* Move over some link resets to Reboot, drop others
- Move over background-color and text-decoration
- Drop focus outline change given it affects the offset on hover of
focused links
* Move over more code element resets, consolidate with pre overrides, too
* Move over sub and sup wholesale
* Move over img normalization to Reboot
* Move over SVG override too
* - Drop dupe hidden, but add comment for it
- Move over template
- Move over summary
* Remove bulk of @viewport comment
* edit down that code comment
* consolidate html-based normalizations
* update comments
* Consolidate abbr styles
* move over more type elements
* move over hr changes
* move over form controls and more
* move over button resets
* move over firefox button changes
* move over search changes and more
* we nuke all these styles for fieldsets anyway, so outright remove them
* no need for those, we override them
* move over legend, fieldset, progress
* line break
* delete normalize file
* linting
* update comment
* clarify docs mentions of normalize and reboot
* remove normalize excludes from linter
* remove normalize excludes from cli task
* linting
* callout license since we forked part of normalize
* Improve comments, move table background reset to .table class instead of in reboot
* trailing space
* Update ie10-viewport-bug-workaround.js year
* Update narrow-jumbotron copyright year to 2017
* Update carousel/index.html copyright year to 2017
* Update browsers-devices.md copyright year to 2017
* Update change-version.js copyright year to 2017
* Remove IE compatibility mode meta tag from docs, examples, and JS tests as we no longer support IE9 and IE8
* update and remove some IE bits from our supported browser page
* update introduction.md to match
* reword starter template intro
* remove the $enable-flex variable option
* remove bootstrap-flex.css dist file and it's grunt task
* remove the separate flex css file for docs; it's all the same now
* remove flexbox docs (porting some to the main grid docs in next commit)
* clean up few grid docs bits to simplify copy, start to mention flexbox
* port relevant flexbox-grid.md content to grid.md
- clean up mixins
- update how it works section
- bring over sizing and alignment sections
* remove the $enable-flex from the options.md page
* update lead paragraph to mention flexbox
* update migration to mention loss of ie9 support
* remove mention of flexbox dist file
* clarify IE support
* making a note
* remove flexbox variant mentions from component docs
- updates docs for media object, navs, list group, and cards to consolidate docs
- no more need to callout flexbox variants since it's now the default
* remove $enable-flex if/else from sass files
* remove flex dist files
* update scss lint property order to account for flex properties
* linting
* change to numberless classes for autosizing, wrap in highlighting div
* bump gruntfile and postcss to ie10
* redo intro sections
* rearrange
* phew, redo hella grid docs
- rearrange all the things
- consolidate some bits
* remove reference to flexbox mode
* more border action for demo
* Make some changes to the .card's in .card-deck's to ensure footers align to the bottom
* descriptions for getting started pages
* descriptions for layout
* add content page descriptions
* more descriptions, updates to some existing ones
* correct site url
* add social stuff to config for twitter cards
* add twitter meta tags; use large image for homepage and regular card for all others
* add the assets
* more site config
* more social shiz to partial, remove existing meta for the partial, remove page title from homepage for simpler if statements
Refs #19990
Continues the degruntification process.
Also removes mq4-hover-shim for now,
since it doesn't yet implement the standard PostCSS plugin interface.
The modal backdrop positioning bug related to iOS' virtual keyboard doesn't seem to reproduce in iOS 8.0+.
(Possibly as a side-effect of https://bugs.webkit.org/show_bug.cgi?id=153224 )
Refs #9023
[skip sauce]