Updated State of Valhalla documents

[Brian Goetz]

Just in time for Christmas, the latest State of Valhalla is available!

https://openjdk.java.net/projects/valhalla/design-notes/state-of-valhalla/01-background
https://openjdk.java.net/projects/valhalla/design-notes/state-of-valhalla/02-object-model
https://openjdk.java.net/projects/valhalla/design-notes/state-of-valhalla/03-vm-model

The main focus for the last year has been finding the right way to expose the Valhalla features in the user model, in a way that is cleanly factored, intuitive, and clearly connects with where the platform has come from.  I am very pleased with where this has landed.

There are several more installments in the works, but these should give plenty to chew on for now!

Simple corrections accepted as PRs against valhalla-docs.