* updated frozen.mat
* map [+frozen] some adjustments to the 'industrial' assemblies
* map [+frozen] st_h03.map becomes st_n07.map, because name was misleading

* the name implied there is a house on that tile, but there isn´t
* map [+frozen] some adjustments to st_h02.map
* map [+frozen] st_h02.map is now st_i09.map, because the name was misleading

* the name implied there is a house on the tile, but it fits the industrial theme better