Rename model filter to object filter?

[tfausak]

The model filter doesn't really define a model. It defines an object. More specifically, it defines an instance of a class. For instance, if you want a Proc input, you have to do this:

model :proc

That doesn't really make sense to me. I think this would be better:

object :proc

I think we ended up with model because we usually use this filter for ActiveModel objects. But it's designed to work with anything. I think we should change the name to reflect that.

[AaronLasseigne]

> Class.ancestors
=> [Class, Module, Object, Kernel, BasicObject]

It also seems to more clearly indicate the fact that it can be used for modules.

[AaronLasseigne]

I think this is a good change.