fixes #269. fixes #270. changed '>= 2.4' to '= 2.4.x' and '>= 2.6' to '= 2.6.x'
fixes #269. fixes #270. changed '>= 2.4' to '= 2.4.x' and '>= 2.6' to '= 2.6.x'

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