move things around

Moved alerts, badges, button groups, buttons, carousel, close to
variables.less and customize.html
Fixes #8732: unfucks disabled fieldset form example with form groups
Added padding variable for alerts and changed customize.html Warning state (which doesn't exist anymore)
Comma for clarification
Update labels to include a base class

* Builds on the new button styles by requiring a `.btn-default` for the
regular, gray labels
* Updates components examples to show new stuff
Remove dupe hover background color
Merge pull request #9121 from Flydiverny/alerts

Added padding variable for alerts and changed customize.html
Fix Issue #8175
Fix Issue #8175 - remove lh for input-lg|sm
Merge branch '3.0.0-wip' of https://github.com/saas786/bootstrap into saas786-3.0.0-wip

Conflicts:
	customize.html
	less/alerts.less
	less/badges.less
	less/button-groups.less
	less/buttons.less
	less/carousel.less
Merge pull request #9124 from geedmo/3.0.0-wip

 Fix Issue #8175 - .input-group-addon broken in Firefox
remove dupe border-box
Merge branch '3.0.0-wip' of github.com:twbs/bootstrap into 3.0.0-wip
fixes #8647: remove focus outline on :focus of buttons in button groups
Fix pixel values in Responsive Utilities docs to match the actual code
Merge pull request #9130 from twbs/straight-up-wrong

Fix pixel values in Responsive Utilities docs to match the actual code
Merge branch '3.0.0-wip' into bs3_alerts_default_class

Conflicts:
	dist/css/bootstrap.min.css
Merge pull request #9123 from twbs/bs3_alerts_default_class

Update labels to include a base class (fixes #8752)
remove repeated 'pagination' class in code example
Merge pull request #9134 from neilhem/3.0.0-wip

remove repeated 'pagination' class in code example