0.15 small tunnings

[palmic]

(Will be updated while playing)


* Since new map NV feature is available only for radar-reached region, it would be better if we wouldn't be allowed to see machines "hover" stats out of our radar reach (currently we see it even in map styled view out of radar reach in closer zoom)
* "Coal age" should take much much longer. Currently you just need to spend a few minutes with it until youll create first boiler steam generator. I would like to have this gated by research to spend more time with coal fueled instruments..