Chaperone Tree Relations

[tylernathanreed]

I was recently working on something where I pulled in a tree, and I needed to access information regarding ancestors of the tree. Tapping into these relations caused database queries, despite the models being within the collection already. This resulted in loading 5x the number of models as I had records in the table.

The solution for something like this would be to manually load in the parent/ancestor relations, so that if these relations are called, they load models already in memory, rather than reaching out to the database again.

See #260 for the solution I used to fix this.

In my personal project, I implemented this as a macro. However, I'd like to see this implemented into the package itself.