To get started with Android/CyanogenMod, you'll need to get familiar with Git and Repo.

To initialize your local repository using the basic CyanogenMod trees, use a command like this:

repo init -u git://github.com/JDCTeam/manifests.git -b cm-13.0

Then add our local manifest:

git clone git://github.com/JDCTeam/local_manifests.git -b opt-cm-13.0 .repo/local_manifests

This will transform the basic CyanogenMod to the Optimized version.

To sync up:

repo sync

Cd to the path where source code is stored, then run:

. build/envsetup.sh
    lunch cm_jflte-userdebug
        make -j# otapackage

Where # is the number of your CPU cores