fix README.md
Merge pull request #8685 from jouve/3.0.0-wip

fix README.md
Input groups overhaul

* Moves input groups CSS into separate file
* Moves input groups docs into the Components page
* Add support for radios and checkboxes in input groups to fix #8679
Merge branch '3.0.0-wip' of github.com:twbs/bootstrap into 3.0.0-wip
fixes #8665: have modals use auto margin on sides and widen it instead of positioning and negative margin
Remove back to top link from docs
workaround possible bug in grunt-contrib-jshint
tweak Gruntfile.js so it passes jshint
workaround possible bug in grunt-contrib-jshint
tweak Gruntfile.js so it passes jshint
Merge pull request #8695 from twbs/fix-grunt-jshint

Fix grunt jshint
get jshint close to passing by updating .jshintrc settings

I don't agree with these personally, but they jive with BS/@fat's JS code style.
The remaining jshint complaints are things that really actually should get fixed.
Merge pull request #8696 from twbs/jshintrc

get jshint close to passing by updating .jshintrc settings
Merge branch '3.0.0-wip' of github.com:twbs/bootstrap into 3.0.0-wip
temporarily undo @fat's scrollspy enhancement since it fucks firefox and ie
point to different download urls
derp, no s on that url