[GS] A Mountain Is Fine Too

Mountain overhaul mod. You'll love the new mountain tiles! Allows to work and build improvements on mountain tiles. Adds new mountain features and allows resources to spawn on mountain tiles. Mountain tiles remain impassable but city pops can work on them. Gathering Storm required! Compatible with New Frontier 2020 and other DLCs. Brief description City pops can work on mountain tiles. New improvements for mountain tiles: Mountain Mine, Mountain Hamlet, and Anchorite Hovel. New improvement for volcano tile: Volcanothermal plant. Allows some strategic, luxury and bonus resources to spawn on mountain tiles. Added a new gold resource for mountain tiles and hill tiles. New features could be generated on mountain tiles: Mountain Streams and Bleak. New Encampment district buildings can be built on mountains: Mountain Training Range and Mountain Water Obstacle Training Range. New Pantheon belief: Mistress Of The Copper Mountain. Base Terrain Yields Grass Mountain: +1 Food and +1 Production Plains Mountain: +1 Production Desert Mountain: +1 Production Tundra Mountain: +1 Production Snow Mountain: no yields New Mountain Tile Features Mountain Stream: +1 Food and +1 Production. Provides fresh water to the adjacent tiles. Bleak: +1 Faith, -1 Food, -1 Production Improvements Mountain Mine. +1 Production and some techonologies provide up to +4 Production in late game. Could be built on mountain tile, provides strategic or luxury resource from that tile. Gives bonus production to adjacent Industrial Zone district (+1 Production for each 2 adjacent mountain mines). Requires Mining tech and State Workforce civic. Mountain Hamlet. +1 Culture and +0. 5 Housing and +3% Growth rate to the nearest city (growth rate bonuses from the several hamlets are added). Provides +1 Food extra if built on bonus resource that already provides food (Sheeps for example). Could be built on mountain tiles. Anchorite Hovel. Makes tile non-workable. Could be built using the Anchorite unit (it is a new reli