You can clone with
HTTPS or Subversion.
See if we can remove some of the steps.
Maybe helpful: http://stackoverflow.com/questions/4967669/android-install-apk-programmatically
* Issue #224 Smoother RubotoCore installation
Apps with the INTERNET permission can now install RubotoCore directly if "Allow unknown sources" is allowed.
This can definitely be improved more, so any contributions are welcome.