Change required CMake version to >=2.6.2
Change required CMake version to >=2.6.2

--HG--
branch : v1-7

bhlzlx/ogre,bhlzlx/ogre,ruleless/ogre,ruleless/ogre,bhlzlx/ogre,ehsan/ogre,ehsan/ogre,ruleless/ogre,ruleless/ogre,bhlzlx/ogre,bhlzlx/ogre,bhlzlx/ogre,ruleless/ogre,ruleless/ogre,ehsan/ogre,ehsan/ogre,ehsan/ogre