added commented code for the ':not()' resolver in the compiler to avoid nested complex selectors (if necessary), fixed regular expression missing escaped parenthesis in previous part of the related fix in 'select_qsa', removed a couple of spaces
added commented code for the ':not()' resolver in the compiler to avoid nested complex selectors (if necessary), fixed regular expression missing escaped parenthesis in previous part of the related fix in 'select_qsa', removed a couple of spaces

dperini/nwmatcher,dperini/nwmatcher,dperini/nwmatcher