Everything related to development starts here
To download and build everything please clone the branch aosp-6.0.0_r1 from THIS REPOSITORY in your .repo/local_manifests then sync:
gabry3795@darkseat-works:~/aosp$ cd .repo/
gabry3795@darkseat-works:~/aosp/.repo$ git clone git@github.com:mt7-dev/local_manifests.git -b aosp-6.0.0_r1
gabry3795@darkseat-works:~/aosp/.repo$ cd ..
gabry3795@darkseat-works:~/aosp$ repo sync