Tirar hardcode do formato da data.
Modificando a parte REST.
Merge branch 'master' of https://github.com/CodeVale/jug-call4papers.git

Conflicts:
	src/main/java/org/jugvale/call4papers/rest/impl/AutorEndpoint.java
	src/main/java/org/jugvale/call4papers/rest/impl/EventoEndpoint.java
	src/main/java/org/jugvale/call4papers/rest/impl/PaperEndpoint.java
	src/main/java/org/jugvale/call4papers/rest/utils/JaxRSActivator.java