New location: Overseers Camp near Vault 76

Misc:
2 Vault-Tech Stash Boxes added to the map
Terrain Changes to make more like West Virginia in Fallout 76
Fixed school building and updated school buses
Blasted Logs not can be used as containers
Warren Theater interior space

Buildable items added!
Corvega Generator Small
Corvega Generator Large
Corvega Workshop Water Purifier
Corvega Workshop Water Purifier Large
Power Armor Workbench Red