feat(build): treat libs/ as "included builds"
feat(build): treat libs/ as "included builds"

instead of subprojects. This is _mostly_ the same as what we've been doing, but gradle treats it more as a self-sufficient build on its own and provides less opportunity to mess with the configuration of other things in the multi-project.

MovingBlocks/Terasology,Nanoware/Terasology,MovingBlocks/Terasology,Nanoware/Terasology,Nanoware/Terasology,MovingBlocks/Terasology,Malanius/Terasology,Malanius/Terasology