event bus implemented, one test fails.
NotificationsTest@testNoficationSource test fixed
Merge branch 'develop' into event-bus
All tests passed.
Before/Aftetr event distiction introduced.
RO/ROComponent event distiction introduced.
old listeners removed.
Thing.postEvent(event) instead of  ROEventBusInjector.getInjector().getInstance(EventBus.class).post(event);
Solr and Notifications listeners instead of RO and ROcomponent listeners.
Merge branch 'event-bus' into develop

Conflicts:
	src/main/java/pl/psnc/dl/wf4ever/model/RO/ResearchObject.java
	src/test/java/pl/psnc/dl/wf4ever/notifications/NotificationsTest.java