Beta TEM2 / TЭM2 Locomotive 0.12

Time for another update ^-^



Changelog:
+Added air couplers (no physics yet)
+Added 2 new ТЭМ2 skins and configurations (TEM2-148, TEM2-206)
+Added 3 new ТЭМ2У skins and configurations (SM48-279, SM48-127, SM48-126)
+Added the cab light in ТЭМ2У
+Added new, "modern" healights
*Changed names of all the skins and config files to be more accurate
*Wheels will no more randomly pop out of the rails
*Engine thermal simulation is way more realistic now
*Overall engine simulation is a bit more realistic now (still needs improvements)
*Obstacle deflectors will no more "bounce" when the train is braking
*Fixed roof textures