added ordereddict as dependency for python 2.6.
added ordereddict as dependency for python 2.6.

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