Everything so far

`method-list` (for adding breakpoints) isn't ready yet because `core-selector`  is buggy.
The plan is to put `method-list` and `object-tree` on the right side in separate tabs. But `paper-tabs` was  not being compliant with `vulanize`, so that's not done yet.

Requires `O.o()` to work.

Thank you
Apparently all uses of EvalHelper.executeFunction rethrow error if it is not null. If that's the case, can't you add this behavior to EvalHelper? If there is an exception, you can always try/catch.