Lightmap.get/MapLayer.get are now nullable, better overworld generator with Joise, still needs fix in the dirt layer part.

Former-commit-id: 0a5fa31bab45d093771ca109adbeb9c07fb8e90e
Former-commit-id: d8a2b5b77a36b6c742cf220b2d325895111c8f3a

res/raw/factions/FactionGenericPlayer.json

@@ -0,0 +1,8 @@
+{
+  "factionname" : "player",
+
+  "factionamicable" : ["follower"],
+  "factionneutral" : ["controlledvillager"],
+  "factionhostile" : ["wildlifehostile"],
+  "factionfearful" : ["wildlifeflee"]
+}