Replace NotFoundHttpException with NotLoadableException
Other loaders
enabled symfony 2.4 on travis
Test fix
added 2.5 with allow_failures
Merge pull request #416 from digitalkaoz/travis_sf_2.4

enabled symfony 2.4 on travis
added a bunch of tests and covers annotations
Merge pull request #417 from digitalkaoz/tests

increase test coverage report
Merge pull request #403 from me1ifaro/loaders-should-not-throw-http-exceptions

Fixes #373. Replace NotFoundHttpException with SourceNotFoundException
added scrutinizer config