Revert "Temporarily revert README deletions from #13470,"

This reverts commit 54284a13c6b503d925bf6f75db2830f1af7fcf98.
fix #13185 - keyboard support for carousel
add special transitionend type to test event origin
fixes #13430
Add dropped text-justify
Merge pull request #13791 from BBosman/justify

Add dropped text-justify
Fixes #13453: add firefox table-border and tbody bug to wall of bugs
tweak #13453 Firefox bug summary
Merge pull request #13787 from twbs/fat-3731

fix #13185 - keyboard support for carousel
grunt dist
Update generated markup by the tooltip plugin in docs; fixes #13796
Merge pull request #13799 from hnrch02/update-generated-markup

Update generated markup by the tooltip plugin in docs; fixes #13796
Fix regression of #10038 introduced by #13772
Merge pull request #13800 from hnrch02/fix-umd-regression

Fix regression of #10038 introduced by #13772
Merge pull request #13786 from twbs/fat-13430

add special transitionend type to test event origin
some changes from #13801 - add strict mode back and ==
min-content is standard, so no need to vendor prefix it

Also, makes little sense to say that Firefox sets a `-webkit`-prefixed value
bump load-grunt-tasks to ~0.5.0

[skip validator] [skip sauce]
Merge pull request #13820 from twbs/bump-load-tasks

bump load-grunt-tasks to ~0.5.0
fix #13386
README.md: Refactoring bages.