To get started with Android/BeanStalk, you'll need to get familiar with Git and Repo.
To initialize your local repository using the BeanStalk trees, use a command like this:
repo init -u git://github.com/Co-BeanStalk/android.git -b kk4.4
Then to sync up:
repo sync (-j4) (-j8) (-j16)- This depends on number of cpu cores- use just "repo sync" if you are unsure of what to use.
Please see any of the official beanstalk XDA threads for building instructions.
For more information on this Github Organization and how it is structured, please read the wiki article