Fixed nested tab elements li activation

Added closest li instead of direct parent so that you can nest multiple elements within tabs, such as button groups
Merge pull request #13191 from AshleyDawson/master

Fixed nested tab elements li activation
versions
grunt dist
Merge pull request #13578 from twbs/fat-versions

versions
grunt for raw js
Merge branch 'master' of github.com:twbs/bootstrap
grunt
grunt
no more concurrency
unfuck the gruntifle
Update jQuery to v1.11.1.
Remove RTL leftovers.
Merge pull request #13579 from twbs/nuike-more-rtl-stuff

Remove RTL leftovers.
remove update-shrinkwrap from the default Grunt task

Most folks shouldn't care about the shrinkwrap.
It should only be run on-demand, not as a routine/periodic thing.
add link to StackOverflow question regarding Android <select> bug
Remove unneeded spaces from `pre`.
bump grunt-saucelabs to v5.1.3
Merge pull request #13594 from twbs/bump-saucelabs

bump grunt-saucelabs to v5.1.3
change note in .resizable() mixin for accuracy

Not a Safari bug. It's standards-compliant.

Quoting from http://www.w3.org/TR/css3-ui/#resize :
> ### 8.1. `resize` property
>
> * Applies to: elements with `overflow` other than `visible`
>
> The `resize` property applies to elements whose computed `overflow` value is something other than `visible`.

Original comment was added in commit 648c4689273647c321dd6e3979d910282e9a9339.