release notes for OpenSRF 2.3.0 beta

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
bump up version numbers of OpenSRF 2.3.0-beta

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
change log for 2.3.0-beta

Signed-off-by: Galen Charlton <gmc@esilibrary.com>