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
All those properties are HTML generic properties (all HTMLElements have them). They're not supposed to be in this level of prototype chain, but they are.
We don't want to show them in the object tree.

Alright, I'll put a link to the docs.