update comment for new .launch method

bfps/__main__.py

@@ -46,7 +46,7 @@ def main():
     # first option is the choice of base class or -h or -v
     # all other options are passed on to the base_class instance
     opt = parser.parse_args(sys.argv[1:2])
-    # error is thrown if first option is not a base class, so Launcher
+    # error is thrown if first option is not a base class, so launch
     # cannot be executed by mistake.
     c = eval('{0}()'.format(opt.base_class))
     c.launch(args = sys.argv[2:])