infrastructure update: wiki location, etc.

[John Rose]

We have created a parent wiki page for Sumatra developers to host project documentation, here:
  https://wikis.oracle.com/display/OpenJDK/Project+Sumatra

We will also create an initially empty, standalone repository.  It will hold experimental copies of things like Aparapi.

Serious JVM and JDK modifications will also require repositories, but we won't build those just yet.

Some initial JVM development will be hosted by the mlvm project, as one or more patches, such as this one:
  http://hg.openjdk.java.net/mlvm/mlvm/hotspot/file/tip/value-obj-8001111.patch

Have a good weekend!

— John Rose