Make sure we run to_unicode on all properties we read from disk or get from the user (bug 390680).

Don't try to run global scripts of the global script directory doesn't exist (bug 386244).

wicd/misc.py

@@ -182,6 +182,8 @@ def WriteLine(my_file, text):
 
 def ExecuteScripts(scripts_dir, verbose=False):
     """ Execute every executable file in a given directory. """
+    if not os.path.exists(scripts_dir):
+        return
     for obj in os.listdir(scripts_dir):
         obj = os.path.abspath(os.path.join(scripts_dir, obj))
         if os.path.isfile(obj) and os.access(obj, os.X_OK):