Super DragAndGo "drag a word" fixed

Method 1：

• https://addons.mozilla.org/en-US/firefox/discussions/comments.php?DiscussionID=547

• http://mozilla.code65536.com

Method 2：

• http://superdragandgo.mozdev.org/feedback.html#c268

• http://henrik.nyh.se/filer/superdrag-fixed.xpi

• http://pastie.textmate.org/47803