twitter/bootstrap — pull request #4884 by armin-rezit (2012-08-31 08:44:45+00:00)
Title: Implement a flexible and easy to use "theme feature", and add a clean RTL support using themes

By adding three new targets in Makefile, I've been implemented a theme feature:
1) every theme directory resides in 'themes' directory under the root.
2) each theme has it's own (optional) set of LESS and JavaScript files which will be overwrite default bootstrap files during 'theme build'.
3) after building a theme, there will be a 'build' directory under the theme directory which include build files of the theme
4) in this way, a RTL version of twitter-bootstrap implemented in a clean way (as a theme). so, changing bootstrap core doesn't break anything in this theme (only few changes in theme files and everything will be OK)