Matt, after the conversation we had with Frank this afternoon, I'll probably close this pull request in the next day or two.  But according to your comment above -- would you like us to be including both the Copyright assertion *and* the Apache 2.0 license in the comment header?  I had only included the assertion in the previous commit for the sequence dictionary work -- we're happy to do either of course, just wondering which was your preference and make sure we're on the same page as you.