Merge pull request #5 from adorilson/master

Refazendo o POST em /evaluation funcionar
Adding the functionality of persisting evaluations associating with
articles
Merge pull request #6 from danielalencar/master

Evaluations - Server Side
Updating the queries to retrieve articles by its titles, not more from
ids.
Merge pull request #7 from danielalencar/master

Changing the retrieving method of articles from Id to Title
Implementing the evaluations on the server
Merge pull request #8 from danielalencar/master

Evaluations on server
Remocao de transacao em loadByTitle.

Essa transacao impedia que o artigo fosse posteriormente
editado.