Removed support for Jackson 1 based repository populators in favor of Jackson 2 based ones. Removed PageableArgumentResolver in favor of PageableHandlerMethodArgumentResolver. Removed legacy setup code of the new HandlerMethodArgumentResolver implementations.
Some tests required an explicit dependency to servlet-api-3.x.
The GenericApplicationContext doesn't refresh automatically in Spring 4.x we thus we have to call refresh manually. Added a specific version of populators.xml for Spring 4.x since the jaxb2-marshaller element definition no longer renamed the contextPath attribute to context-path in 4.x.
Original pull request: #52.
Added necessary infrastructure to use Jackson 2 with repository populators. Expose a jackson2-populator XML element in the namespace to setup a Jackson2 based repository populator.
