Fixes for STP.
Merge pull request #10 from ruricolist/stp

Fixes for STP.
Updated read me to fix query arg list description

re issue:11
Added STP notes to README AccelerationNet/css-selectors#11
updated to lisp-unit2 re ADWolf:#1201
:empty pseudo-selector.
Avoid needless consing.
Define and export `query1'.