emphasize that bootstrap-rtl.css & bootstrap.css should not be used together
Fix .visible-print deprecation version #.
unlock & bump grunt-jscs-checker to ~0.4.3
Merge pull request #13528 from twbs/unlock-jscs

unlock & bump grunt-jscs-checker to ~0.4.3
Merge pull request #13504 from Quy/resputil

Fix .visible-print deprecation version #.
Merge pull request #13499 from twbs/clarify-rtl

emphasize that bootstrap-rtl.css & bootstrap.css should not be used together
move rtl to getting started, per @cvrebert's feedback
move Grunt info from README into HTML docs

Fixes #13470
Merge pull request #13531 from twbs/grunt-html-docs

move Grunt info from README into HTML docs
Update .travis.yml
Remove outdated rtl nav links
Merge pull request #13536 from Quy/master

Remove outdated rtl nav links
grunt dist
Customizer: make utilities.less inclusion mandatory

Fixes #13305.
Merge pull request #13543 from twbs/fix-13305

Customizer: make utilities.less inclusion mandatory
add role="tablist" to .nav-tabs in examples to improve accessibility

Per https://github.com/paypal/bootstrap-accessibility-plugin#tab-panel
Credit: https://github.com/paypal/bootstrap-accessibility-plugin
add role="tab" to .nav-tabs [data-toggle="tab"]

Per https://github.com/paypal/bootstrap-accessibility-plugin#tab-panel
Credit: https://github.com/paypal/bootstrap-accessibility-plugin
add role="button" to [data-slide="prev"],[data-slide="next"] to improve accessibility

Per https://github.com/paypal/bootstrap-accessibility-plugin/blob/master/README.md#carousel
Credit: https://github.com/paypal/bootstrap-accessibility-plugin
Merge pull request #13559 from twbs/carousel-role

add role="button" to [data-slide="prev"],[data-slide="next"] to improve accessibility
Merge pull request #13558 from twbs/nav-tabs-role-tablist

add some ARIA roles to tabs for improved accessibility