Improve biome map (#246)

* Start biome map rewrite

* Remove climate layers and add end biome source

* Update to use RandomState

* Make biome map work for past versions

* Remove old biome map code

* Implement multi noise presets and fix caching

* Update deepslate

* Fix biome hover

* Fix #190 biome map diagonal lines
Also increases performance by making better use of the biome cache

* Add proper zoom limit

src/locales/en.json

@@ -219,5 +219,6 @@
   "worldgen/world_preset": "World Preset",
   "worldgen/flat_level_generator_preset": "Flat World Preset",
   "zoom_in": "Zoom in",
+  "zoom_in_limit": "Cannot zoom in further\n1 pixel = 4 blocks",
   "zoom_out": "Zoom out"
 }