Add additional fuel resource

[linuxgurugamer]

Make this optional.

This looks like a great mod, one that will definitely go into my next playthrough. However, I would prefer if the drives used a different power source, like Exotic Matter. I looked through the part configs and haven't found a way to change the resource used for the jump, so I was wondering if anyone has changed it, and how they did it.

A better possibility would be to simply add an additional power source, so that it would need both EC and Exotic Matter, but this isn't going to happen for a while, at least not until I finish all the updates.

[linuxgurugamer]

Done in current release