[selectors-api] Names of querySelector() and querySelectorAll() methods

I find these names rather cumbersome and not very self-explanatory.

Though it may be far too late for this suggestion, I would suggest  
that they should be something such as:

findNode()/findNodes() or findNode()/findAllNodes()
selectNode()/selectNodes() or selectNode()/selectAllNodes()
findBySelector()/findAllBySelector()