EPUB now managed by W3C. Latest release is still in conjunction with IDPF, so for now they continue to be included in the agent name. Next iteration might switch to W3C only.

The following changes were made to support EPUBCheck 5.1.0:
1. New version lists resources with fragments making resource list much longer without reflecting new files in the package. Added logic to remove resources with fragments and only list base URL.
2. EPUBLocation changed slightly, updated code to manage support that change.
3. Some redundant messages were removed, which changed some message counts in tests - fixed message counts to reflect correct output.
4. Update validation version to 3.3 - there is no way to determine the minor version number in an EPUB, so validation is always against whatever the latest is.
5. CREATION_DATE is missing from the report, I've logged an issue and commented out the relevant lines in tests. It will be fixed in the next maintenance release and I will move to 5.1.1 when available to add creation date back in.
6. A file that was being used to test title has flipped from Well Formed and Valid to Well Formed and Not Valid according to current criteria - updated the test to reflect this.