Start 2.0.3 development.

Change-Id: I1f358b85d865673d77a585dc1fac47b378b4c15d
Reviewed-on: http://review.couchbase.org/44697
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Reviewed-by: Simon Baslé <simon@couchbase.com>