Update Slf4J to version 1.7.7
Update Junit to 4.11 and add hamcrest - because the method assertThat is working with hamcrest matchers
Merge pull request #35 from SvenBunge/slf4j_177

Update Slf4J to version 1.7.7
Merge pull request #31 from SvenBunge/updatejunit411

Update Junit to 4.11