[hibernate-dev] Loader redesign proposal

I believe something like the work I had in mind for https://github.com/hibernate/hibernate-orm/wiki/Proposal---Loader-redesign is the best option for implementing JPA 2.1 "entity graph" support into Hibernate. To that end I have been working on that proposal to see how quickly that could come about. Essentially the phase we need to tie in "entity graph" support is a redefinition of the current JoinWalkers. The approach I took, at a high level, is that of the visitor pattern. The work currently lives at https://github.com/sebersole/hibernate-loader-redesign I'd appreciate any extras eyes. Longer term I'd like the stuff that lives in the org.hibernate.loader.walking package to be part of the run time (persister) metadata, but for the moment I just use wrapping and delegation.