Replaced <i> with <span> for glyphicon

Fix overlap sidebar for Tablets and up in docs

Needs work though—we shouldn't be setting this stuff with the attribute
selectors, but it's the easiest solution for now.

Reset left padding for .carousel-indicators

Navbar fixes

navbar padding-left and padding-right should be calculated from the grid-gutter-width variable.

3.0.0 wip

Remove offcanvas from footer and change placeholder in css.html

This was moved inline in 65ad5206

applies 2535e060 to css.html. Wasn't
docs.html removed a while ago?

Rename class name in placeholder

Prevents an odd alignment issue in mobile views by forcing the nav
links to be full width without undoing the float.

Attached disabled styles to the exact input types rather than all
inputs and reseting the checkbox/radios. If setting `background-color:
transparent;`, iOS renders no background on the disabled control.

If the popover's title contains no text, hide it via JS. Previously was
done via CSS's `:empty` property, but that doesn't work in IE8, so JS
it is.

/cc @fat becaue I probably did this wrong <3

Fixes broken layout for .input-group-addons within .input-large. Follows...

Add heading font family variable

rename '.navbar .nav' to '.navbar-nav'

* Remove plugin file and put JS inline
* Update grid layout to use tablet columns
* Switch from LESS to CSS for transition
* Pad footer sides for better mobile rendering
* Spacing cleanup

Merge branch 'offcanvas-example' of https://github.com/trumbitta/bootstrap into trumbitta-offcanvas-example