Add a .navbar-default class for default colors

* Extract color styles from .navbar { } and put them into
.navbar-default { }
* Change variable names
* Change the docs accordingly (i.e., add the .navbar-default class to
all default navbars)
* Change customizer accordingly
Fix some forgotten things for navbar-default

New variable names were missing here and there.
fixes #9803: label and input alignment in horizontal forms
regenerate Glyphicons LESS from their website; fixes some wrong codepoint numbers
tweak some of the Glyphicon class names to match Bootstrap conventions
regenerate CSS
Merge branch '3.0.0-wip' of github.com:twbs/bootstrap into 3.0.0-wip
Add new navbar-default class to examples
regenerate Glyphicons listing/demo section of docs
account for 9fa0a5d12718bef464e002d9b850aebcb63c79e4 in the docs
fixes #9798: update spacing on checkboxes and radios for horizontal
Merge branch '3.0.0-navbar-default' of https://github.com/juthilo/bootstrap-wip into juthilo-3.0.0-navbar-default

Conflicts:
	dist/css/bootstrap.min.css
fix broken button
Merge branch '3.0.0-wip' into glyphicons-LESS-fixes

Conflicts:
	dist/css/bootstrap.min.css
Docs help correction

Just a little contribuition of mine to BS community. Correcting a doc
info error.