Resolve issue #2: suport for CXF interceptors

- Updated JAXWSBundle:
  - new publishEndpoint method uses EndpointBuilder for creating server
    side endpoints. In addition to existing features (Hibernate support,
    authentication), CXF interceptors are now supported.
  - new getClient method uses ClientBuilder for creating client proxies.
    ClientBuilder supports existing features (JAX-WS handlers), CXF
    interceptors and modifying default connection timeouts.
  - existing publishEndpoint and getClient methods were deprecated. All
    these methods now use EndpointBuilder/ClientBuilder internally.

- Updated examples: JaxWsExampleApplication now contains sample code for
  using CXF interceptors (client and server side).

- Updated README
Release 0.3.0
Set POM version to 0.4.0-SNAPSHOT