updated README to include mplotqueries.
updated README to include mplotqueries.

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