remove duplicate text in documentation for popover
Merge pull request #10653 from homeyer/patch-1

remove duplicate text in documentation for popover
Simplified CSS responsive-invisibility mixin
Fix package.json

* Add "js" keyword
* Fix homepage link
* Bump grunt-contrib-connect to newer version
Merge pull request #10661 from Shotster/simplified-responsive-invisibility

Simplified CSS responsive-invisibility mixin
Remove "js" keyword /cc @cvrebert
Merge pull request #10664 from ZDroid/patch-1

Fix package.json
Merge branch 'master' of https://github.com/twbs/bootstrap into develop
Some small branding updates