Glass and Greenhouse

Adds glass resource which can be obtain by smelting silicon at the furnaces. Some windows now require glass to be built. The costs of the base material for all windows was reduced. Metal refinement tech was renamed to Furnaces and moved to Construction column, it unlocks glass too. New Greenhouse building: - during daylight, the temperature inside will rise above the one on the outside - you may want to give it a try on Alba - many thanks to injto4ka for all the help to make this happen - being a complex building there are some known limitations, check this discussion for details In the future I intend to add other glass items. Buy Me a Coffee Paypal Support Version: 1. 13-006