adding refute_action_planed
Merge pull request #106 from jlsherrill/refute_action_planed

adding refute_action_planed
Merge pull request #107 from pitr-ch/master

Check that action's in/output is serializable, error the action when not
bump version
Change Type checks form Float to Numeric to work with BigDecimal

because `BigDecimal.superclass` is Numeric