Adding New OP: List16

Trying this again. This time I followed the steps @ www.monome.org/docs/aleph:forking. 

Although '88 commits' seems 'off' like it did last time. If this doesn't work, i apologize. We might have to do the manual addition thing then I can try again in the future with a fresh fork. I suppose I should say "clean fork"

Note: I had to do a bunch of merging to pull this off and I noticed that page_ops.c would probably have to be further updated to represent a total of 31 ops. So this pull request is probably bad again. Rats.