Proposal: `history_tracks` method should be dynamically named

[johnnyshields]

Currently suppose we have a trackable model like Customer. Then we have:

@customer.history_tracks     #=> returns criteria for tracker class

The problem is that many apps set tracker_class_name to something else, such as Audit, etc. So I think it would be better to infer this method name from the tracker_class_name, such as:

@customer.audits    #=> returns criteria for tracker class

Thoughts?

[dblock]

Makes total sense to me. I would preserve the ability to re-define the name for this in the declaration of course.