negativeRe: tip, dialog

add 2 negativeRe strs: tip and dialog

test pages:
http://tw.people.com.cn/n/2014/0503/c14657-24967764.html
http://game.163.com/14/0502/16/9R8LD8C90031400S.html

remove form from trashNodes
choose topCandidate siblings by children('p')