Improved Megastructures

EDIT: Will not be updated further. if you want something for LIVE version, use Gigastructures. Should still work for Legacy (2. 2. 4). What this mod does: 1. Allows to construct multiple megastructures at same time 2. Removes limit on number of megastructures. 3. Allows construction of Ringworlds around black holes 4. Mega Engineering tech available as guaranteed research option with Voidborne as well as Master Builders 5. Galactic Wonders now requires 2 perks to be picked (down from 3). 6. New megastructure - Star Forge, consumes energy and minerals to produce alloys. Note that i am not original creator of Star Forge. I took over an abandoned mod, originally set to create a mineral-producing megastructure, and updated it to work with 2. 2 to produce alloys instead. Compatibility: this mod OVERWRITES the megastructres text files. Everything else is mod-specific.