Adds spawn output rendering (variant of night which shows dark areas in red) and support for multiple map types with buttons to switch between them.

world.py

@@ -95,11 +95,12 @@ class WorldRenderer(object):
     files to update. If it includes a trailing newline, it is stripped, so you
     can pass in file handles just fine.
     """
-    def __init__(self, worlddir, cachedir, chunklist=None, lighting=False, night=False, useBiomeData=False):
+    def __init__(self, worlddir, cachedir, chunklist=None, lighting=False, night=False, spawn=False, useBiomeData=False):
         self.worlddir = worlddir
         self.caves = False
-        self.lighting = lighting or night
-        self.night = night
+        self.lighting = lighting or night or spawn
+        self.night = night or spawn
+        self.spawn = spawn
         self.cachedir = cachedir
         self.useBiomeData = useBiomeData