Add "timer" as individual setting (#23)

Mystery.py

@@ -217,6 +217,13 @@ def roll_settings(weights):
 
     ret.beemizer = int(get_choice('beemizer')) if 'beemizer' in weights else 0
 
+    ret.timer = {'none': 'none',
+                 'timed': 'timed',
+                 'timed_ohko': 'timed-ohko',
+                 'ohko': 'ohko',
+                 'timed_countdown': 'timed-countdown',
+                 'display': 'display'}[get_choice('timer')] if 'timer' in weights.keys() else 'none'
+
     ret.progressive = convert_to_on_off(get_choice('progressive')) if "progressive" in weights else 'on'
     inventoryweights = weights.get('startinventory', {})
     startitems = []