Minor improvements

[xsrvmy]

This looks like a very good layout that balances alternation with rolling. I plugged it into my layout optimizer I wrote, and it came out with some minor improvements:

• cycling dot, comma and quote so that quote is in the middle. This is the biggest improvement, substantially reducing SFB. Swapping only ' and , is still does most of the work if < and > being out of order is a concern.
• cycling VBK so that B is on the home row. B is the most common letter out of these three, and the MB and CK bigrams become easier.
• cycling QJX so that Q is on the left hand. This came down to the fact that I used Norvig's data where the least common letters in order were ZQJX. It's not worth it if you use vim.