Inherited decorators should be able to be overridden or removed

[Jaymon]

Bar should be able to inherit Foo's arguments and override them. Che shouldn't have foo as an argument. I'm not so passionate about being able to remove/omit the commands, but they should definitely be able to be overridden

class Foo(Command):
  @arg("foo", nargs="*")
  def handle(self, foo):
    self.output.out("foo CAN be empty")

class Bar(Command):
  @args(Foo)
  @arg("foo", nargs="+")
  def handle(self, foo):
    self.output.out("foo CANNOT be empty")

class Che(Command):
  @args(Foo, remove="foo")
  def handle(self):
    self.output.out("foo CANNOT exist")