twitter/bootstrap — pull request #6409 by malekpour (2012-12-27 22:16:51+00:00)
Title: add rtl support

I have added right to left support by adding extra css rules inside '.rtl' classes. This method does not affect original functionality at all, does not need additional css file and will be easy maintainable.
Changes have been made inside the following blocks:
```css
.sample {
margin-left: 2px;
.rtl & {
margin-left: auto;
margin-right: 2px;
}
}
```
Also will supports dynamic layout change by adding or removing '.rtl' class from any container like body.
example:
```javascript
function switchLayout() {
var $body = $(document.body);
if ($body.hasClass('rtl')) {
$body.removeClass('rtl');
}
else {
$body.addClass('rtl');
}
}
```