Nova compute v3 APIs

Created xml pages to hold the v3 compute API extensions.
xml files link to several different wadls, which in turn,
call several api samples. This is not a complete listing,
but it is a start. Will be adding others as they become available.

Closes-Bug: #1274616
Closes-Bug: #1197419
Closes-Bug: #1203653

Change-Id: Ie6d18336b46c262ce3918a9e37238f7403c75eb6