introduced PatchSupportConfig. PatchSupportTraversableResolver and PatchSupportMessageConverter are package private now.
implemented PatchService#patch. UserService#setPassword now requests a user object
removed global ExceptionControllerAdvice in favour of single exception handler for every exception
added subscription resource
FeedParser should return feed title
set defaults in mockMvc: always sent content-type application/json and always expect 'application/json' in the response
introduced custom bean validator: user shouldn't have more than one subscription for a given url
added resource subscription
introduced custom MockMvcResultMatcher that supports json-unit
introduced custom MockMvcResultMatcher thatt supports