Make constants.py into a configuration file

Robert904#9

So we can run multiple instances of the same code with different
configuration options.

mumblerecbot.py

@@ -3,7 +3,24 @@
 import time
 from threading import Thread
 
-from constants import *
+# Try to use the path passed in as first argument as the config
+# file. If no argument is passed in, just import constants from
+# the current directory.
+import sys
+import os
+
+configfile = None
+try:
+ configfile = sys.argv[1]
+except IndexError:
+ # No config file, import the defaults
+ from constants import *
+if configfile:
+ if not os.path.exists(configfile):
+ print "Can't find config path."
+ quit()
+ sys.path.append(os.path.dirname(os.path.expanduser(configfile)))
+ from config import *
 
 import pymumble
 from pymumble.constants import *