Deprecates the old usage of the AEItemDefinitions via the direct method access of
* blocks()
* parts()
* items()
* materials()
and thus use the new re-direct via definitions().
All definitions are now initialized, no matter what. But SubItems, Items and Blocks are not registered, if by chance are disabled.
Split off logic into single responsibilities for storing, initializing and matching the UUID mappings. Added JUnit to create tests for the UUID Matcher to see if its legit. It tests against simple problems like unconform UUIDs and also tests against a valid UUID.