default format for arrays, objects, null, explicit undefined, and DOM nodes

[Fil]

closes #166 #164

(by "explicit undefined", I mean that the key is present and the value set to undefined. If the key is absent, we leave it as an empty cell.)

Todo:

• [x] maybe it needs a unit test for circular javascript Objects?
• [x] add unit tests
• [x] fix tests (it should apply only to tables not select keys)