Refactor strtobool function to return boolean values instead of integers

Author: ahosgood

app/lib/util.py

@@ -6,8 +6,8 @@ def strtobool(val):
     """
     val = val.lower()
     if val in ("y", "yes", "t", "true", "on", "1"):
-        return 1
+        return True
     elif val in ("n", "no", "f", "false", "off", "0"):
-        return 0
+        return False
     else:
         raise ValueError("invalid truth value %r" % (val,))