TLV Redux

Alright @adamvoncorswant, feel free to take a peek when you get a moment. Never before has there been such a test-covered parser :tada: 

FYI @linnie if you're interested. EMV stuff and all that.
It is exactly as it should be. I have even copied Linnies Idea settings for imports to make it Adam-compliant. What's wrong with this? :(