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
Can't you test before pushing to the array? filtering is not O(1) and requires both memory allocation and CPU. Since this method is called recursively, it seems to me that moving filter code to a in-loop check would also avoid redundant checks.