Added release notes to useful links in README.
Added release notes to useful links in README.

Change-Id: I4bf8a0b1aa1b053b09f59ed26b27024bb46a2400
Reviewed-on: http://review.couchbase.org/69064
Tested-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>
Reviewed-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

couchbase/couchnode,brett19/couchnode,brett19/couchnode,brett19/couchnode,couchbase/couchnode,couchbase/couchnode,couchbase/couchnode