Imbo now responds with HTTP 400 if the transformation parameter is invalid. Updated docs and tests
Updated ChangeLog
Merge pull request #237 from christeredvartsen/validate-transformations

An invalid transformation parameter can generates a PHP Warning
Updated ChangeLog
Moved some dependencies around
Added aws/aws-sdk-php
Added variables used in the S3 tests
Added integration test case
Clean up before each test
Initial implementation of the S3 adapter along with some docs
Updated dependencies
Updated ChangeLog
Moved a section
Added test groups and covers annotation, and removed the package and author tags
Updated dependencies