Releasing 2.0.0-beta2

Change-Id: I484efdbb0997b63c5e90122b3cf976133e31d5fd
Reviewed-on: http://review.couchbase.org/41441
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>