First draft of ordering by in eager loaded asso.

Didn't really put too much into it, as I haven't really gotten too far
into figuring out the exact mechanism behind how this stuff is used (But
it was good enough for me to figure out, so should be enough to get
people started off)
Another try, buggered up the IDEA file.

Yeah, webstorm jumped in for some reason.
Merge pull request #142 from GregoryHlavac/order-nested-association

Order nested association documentation