Added simple scripting for yaml files.

gamemap.py

@@ -411,11 +411,12 @@ class MapExit(Thing):
             
 class MapEntrance(Thing):
     yaml_flag = u'!MapEntrance'
+    defaultGraphic = ('clear', 'clear', 'x')
     # no graphic - should not be drawn
     
-    def __init__(self, x: int, y: int, exitid: int):
-        if prefix:
-            description = "{0} {1}".format(prefix, name)
+    def __init__(self, x: int, y: int, exitid: int, name = None):
+        if name == None:
+            name = 'entrance {}'.format(exitid)
         super(MapEntrance, self).__init__('a', name, x, y, description, 1)
         self.exitid = exitid
     
@@ -458,6 +459,7 @@ class GameMap(object):
         self.floorColors = []
         self.wallColors = []
         self.persistent = []
+        self.enterScript = ''
         
     @staticmethod
     def __cleanStr(text: str, end = '\n'):
@@ -674,6 +676,8 @@ list of lists of tuples."""
             level.playerStart = info['playerStart']
         if 'description' in info:
             level.description = info['description']
+        if 'enterScript' in info:
+            level.enterScript = info['enterScript']
             
         # get map colors
         if 'floorColors' in info: