[modules/datetime] Add encoding for locale

When creating the date/time string, use the locale's preferred encoding
to format the string.

hopefully, this

fixes #158

bumblebee/modules/datetime.py

@@ -35,6 +35,7 @@ class Module(bumblebee.engine.Module):
         locale.setlocale(locale.LC_TIME, lcl.split("."))
 
     def get_time(self, widget):
-        return datetime.datetime.now().strftime(self._fmt)
+        enc = locale.getpreferredencoding()
+        return datetime.datetime.now().strftime(self._fmt).decode(enc)
 
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