ios font
fix font path to make it more newbie friendly, especially for macosx
Merge pull request #21 from tiancaiamao/master

fix font path to make it more newbie friendly, especially for macosx
add ios OS macro define
add macro OPENGLES
Merge branch 'master' into public
add particle reset for reuse
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
fix memory error of ios font