Use Ceibo descriptor get for new collection

[ro0gr]

This is the last Ceibo's value usage mentioned in #405

[san650]

Can we rebase the PR on top of master? I think you already fixed the failing tests on master, right?

[coveralls]

Coverage decreased (-0.2%) to 98.555% when pulling 727d9aa on get-for-new-collection into 7fa5913 on master.

[ro0gr]

Hm.. seems like it changes collections behaviour in an un-desirable way:

const p = create({
  c: collection('.selector')
});

p.c === p.c // => false

prior to this change the nodes were equal.. Going to cover it by test and revert the commit