openmrs-atomfeed-2.5.6

[maven-release-plugin]  copy for tag openmrs-atomfeed-2.5.6

Release 2.5.1

• New functionality to intercept event addition and optionally filter them.
  If certain events need to be filtered out based on custom logic, create a groovy file under a directory called eventPublishFilters under the OpenMRS application directory (.OpenMRS) that implements org.openmrs.module.atomfeed.advice.EventPublishFilter. It will automatically be picked up by the module and executed.
• Update atomfeed to 1.9.1