Tech Conquest

I'm working on a small update. -Adding Buildcraft for more automation and transport -Removing FloatingItems mod because it's janky and unsupported -Removing Bookshelf library mod as it is redundant now -Adding NetherPortalFix mod to link portals properly -Adding IronBackpackpacks as many players requested more inventory space -Additionally fixed some ID conflicts that came with buildcraft, twilight and IC2C