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
This looks dangerous to me. There's a non-zero chance that an author could use a variable with this name. I would suggest that if this absolutely needs to be set in the main world, you should use a GUID (such as the extension ID) to ensure that the name is unique.