WIP on new approach to easily keepify built-in functions.
WIP on v0.1
WIP on Upw. Start writing unit tests.
More WIP on Upw
More WIP on Upw, converging now.

Strawman for new approach to easily creating upwardable functions.
Write some stand-alone tests for upward (tst/Upw.html).
WIP rewriting Upw again, to use Shadows.
More useless hacking and wheel spinning.
New upwardable implementation working, sort of
WIP on capturing
Very much wip on computable.
More wip on computable etc.
Get new version of Com.js compiling.
Implement notification on all object events
Detect changes in computable properties.