fix inaccurate comment in media query docs
fixes #9522
Merge branch '3.0.0-wip' of github.com:twbs/bootstrap into 3.0.0-wip
fixes #9507: remove padding on navbar-collapse as any padding on an animated object screws it up; instead use some padding on the navbar nav
fixes #9582: restore img-responsive as a class and move it's mixin to mixins.less
Doc fixes related to #9523
Update css.html

I know the form code are only examples, but it'd be good to encourage usage of the proper input type for the email inputs by changing the type from "text" to "email".
Merge pull request #9598 from coliff/patch-5

Change input type for the email input examples
Merge pull request #9591 from BBosman/9523

Doc fixes related to #9523
Merge branch '3.0.0-wip' into 3.0.0-sass-wip

Conflicts:
	dist/css/bootstrap.css
	dist/css/bootstrap.min.css
	scss/_mixins.scss
	scss/_navbar.scss
	scss/_scaffolding.scss