Poster added
Support for jsonp
Add start and end time to Poster

Remove image filename from Poster. Will add that later. Add more tests.
Add validation annotation to compare two times.
ThemeId removed. Integration tests fixed.
Merge branch 'Issue-5' of https://github.com/LeafCoders/rosette into Issue-5
Date validation simplification on poster.
Null pointer fix
Start-end validation added for event
Sort posters by start and end time
Date fix for Event
Merge branch 'Issue-5' of https://github.com/LeafCoders/rosette into Issue-5
Merge pull request #7 from LeafCoders/Issue-5

Issue 5 - CRUD för Affisch