* edit perf
* Save multiline source in notebooks
* More merges
* Single, multi line works needs work
* Works with single + multi and recomputes active
* Actual perf improvements this time
* code cleanup
* Calculating output position on the fly
* Hmm can we use brackets to make this simpler?
* monday progress
* output working. lots of improvements.
* First tests working
* 10 tests now, fixed bugs
* Cleanup, add output test
* More fixes
* Need to still fix execution count bug
* Tests pass, added comments
* Cleanup
* PR comments round 1
* Deal with merge issues from master, layering
* Deleting duplicate file
* More PR Comments
* PR Comments
