0.9.012


 * Fixed сrash with Imps pathfinding
 * Fixed crash related to Dragons
 * Fixed crash and serious memory leaks relating to some creatures
 * Fixed bug: dwarves sometimes spend two blocks of earth when build one
 * Fixed: dwarf movement shaking in direct control
 * Fixed bug with dwarf moving over holes
 * Fixed: background behind the trees
 * Fixed bug with entering into Snow World
 * Fixed bug: dwarves did not climb out of lava
 * Fixed several minor bugs