add a Signer Utility to sign filters
merge
fix expected path
fix 'hash' typo and update path for testShouldResolveWithCustomFiltersPopulatingCacheFirst
add method to get trimmed hash
strip out special characters - in some instances the hash can contain percentage sigsn which may not play well with some filesystems
prepend resolved path with runtime config prefix - closes #399
Replace NotFoundHttpException with NotLoadableException
Other loaders
Fix of #369 (Trim of forwarding slash in path)
Added test
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
remove unreachable statement as per #402
Merge pull request #403 from me1ifaro/loaders-should-not-throw-http-exceptions

Fixes #373. Replace NotFoundHttpException with SourceNotFoundException
Fixed testsuite #417 in #403