Empire Master Engineers II - SFO

A patch to adjust ChaosRobie's & Zombieflanders' Empire Master Engineers II for SFO. Quick summary of tweaks: Adjusted stats, attributes and abilities so they are closer to SFO's equivalent. Gave them SFO's single entities/characters nerf abilities/skills. All 4 heroes have the engineer SFO skill line. Gave them the Imperial Allegiance ability but not Imperial Tactics, they have a lot of abilities. Gave the Grenadier variant the "Take Cover" missile contact effect like the grenade outrider unit has. Gave Jubal Falk/Rifleman variant the "Shieldbreaker" missile contact effect like handgunners. Added garrison and effects (more ammunitions/missile damage in siege, factionwide building cost reduction) to the new buildings. Changed the Master of Ballistics picture as it is the same as the one used for their steam tank alternate firing mode. Added the upgrades to SFO's Deliverance steam tank. Since the master engineer more is still seeing a lot of update, I expect that this patch will need more updates to keep up too. Feel free to give feedback.