New PowerSystem: MFFS/Fortron

As Modular Force Field Systems implementation of RF API is still broken,
and the Mod-Author decided to support only RF for the moment (as the other Power-Systems are changing too often..) 
i decided to add Fortron support to PowerConverters.

The Consumer/Producer must be placed next to a MFFS Tile/Block to provide or consume energy - wireless fortron transfer is not supported -.

(For example: MFFS Producer next to Fortron Capacitor so the capacitor will be charged by the e-bridge and can supply fortron energy to all MFFS Machines)

Energy Conversion ratio is 1RF - 1 Joule, as the current (but broken) implementation @MFFS converts it by the same way.

I tested a bit ingame and it seems to be balanced/ok.

Note:
in order to function, it requires resonante engine (build-dependency added to gradle buildfile properly)
(Update: its optional of course)