To get started with Android/LionheartOS, you'll need to get familiar with Git and Repo.
To initialize your local repository using the LionheartOS trees, use a command like this:
repo init -u git://github.com/LionheartOS/android.git -b n7
Then to sync up:
repo sync
To Build:
source build/envsetup.sh
lunch lionheart_<device>-userdebug
brunch lionheart_<device>-userdebug