reviewed id, tag and class conditionals, choosed the most spec compliant matching, leaved out some speed improvement in favor of less variables declared in the scope of each selection, removed commented alternatives
reviewed id, tag and class conditionals, choosed the most spec compliant matching, leaved out some speed improvement in favor of less variables declared in the scope of each selection, removed commented alternatives

dperini/nwmatcher,dperini/nwmatcher,dperini/nwmatcher