Clone and update submodule

$ git clone https://github.com/kriolos/kriolos-obiz
$ git submodule update --init --recursive

$ git submodule update --remote

Apache 2 software can therefore be included in GPLv3 projects, because the GPLv3 license accepts our software into GPLv3 works. However, GPLv3 software cannot be included in Apache projects. The licenses are incompatible in one direction only, and it is a result of ASF's licensing philosophy and the GPLv3 authors' interpretation of copyright law.