This is the response to a challlenge by xelantro who said that minecraft mods cannot invoke a shell script.
After I got the shell working, I also intend to include the possibility to take complex calculations to the host system, as well as making the possible calculations easily expandable.

Instructions

0.5 TCP connections to localhost need to be enabled in your config
1. Start MemiumServer.py (or your own Server implementation)
2. Start client on your OC system
3. On the client, type *extshell* followed by the shell command that you want the server system to execute.
4. QED, Xelantro