Added the rc script system.

This sytem allows an user to call functions from a file at startup and
easily disable them. Scripts require a start function to be ran at
startup.

Included is a simple example script. To run it, add it to the `enabled`
table in `/etc/rc.cfg`
Goodbye MJ, it was nice knowing you.
Cleaned up and slightly extended mod drivers (less reflection).
Merge branch 'master' of https://github.com/rmellema/OpenComputers into master-MC1.7.10
A few fixes and some OCD satisfaction.