Make boot loader prefer screens with keyboards attached
make openos perfer screens with keyboards attached.
Ugly workaround for IC2+Racks, closes #404.
Merge branch 'OC1.3-MC1.6.4' of github.com:MightyPirates/OpenComputers
Merge branch 'patch-2' of https://github.com/istasi/OpenComputers
Merge branch 'patch-3' of https://github.com/istasi/OpenComputers
OCD!