zip provider

[Alan Bateman]

One of the items recently added to the list for jdk7 [1] is the 
inclusion of the zip provider so that is available "out of the box" in 
jdk7. Sherman is working on this now. He started with the demo zip 
provider that we had in the nio/nio/jdk repo and has re-worked it so 
that it now accesses the zip file directly (using a FileChannel, not 
with the java.util.zip.Zip* APIs). It's also read-write, using temporary 
storage to manage updates until the file system is closed. Overall it 
should be a lot better than the original demo provider. Hopefully we 
should have a webrev within a few days.

-Alan.

[1] http://openjdk.java.net/projects/jdk7/features/