replaced mplotqueries-tutorial-4 again. (higher res).
replaced mplotqueries-tutorial-4 again. (higher res).

yaowenqiang/mtools,tomzhang/mtools,tomzhang/mtools,ces0712/mtools,corymintz/mtools,tomzhang/mtools,corymintz/mtools,parkhyeonghwa/mtools,rueckstiess/mtools,aerrami/mtools,yaowenqiang/mtools,devkev/mtools,parkhyeonghwa/mtools,ces0712/mtools,corymintz/mtools,aerrami/mtools,devkev/mtools,aerrami/mtools,gormanb/mtools,rueckstiess/mtools,gormanb/mtools,gormanb/mtools,ces0712/mtools,parkhyeonghwa/mtools,devkev/mtools,yaowenqiang/mtools