This theme works with jsTree version ~3.0.x. It is built using SASS and Compass (SCSS Variant). It provides only a single theme, bootstrap. You'll need nodejs to build it.
Its pretty easy to get this working.
It is highly recommended that you install this via bower so you only get the intended distribution files.
$ bower install --save bootstrap-jstree-theme$ git clone $REPO_URL
$ cd $REPO_PATH
$ npm install
$ bower install
$ grunt build
$ cp dist $YOUR_PROJECT_PATHS_PUBLIC$ npm install
$ bower install
$ grunt
$ python -m SimpleHTTPServer
$ open "http://0.0.0.0:8000/test/index.html"