forwardim2col seems to work for general dimensions now
forwardim2col seems to work for general dimensions now

FighterLYL/DeepCL,MiniLight/DeepCL,hughperkins/DeepCL,Peilong/DeepCL,MiniLight/DeepCL,hughperkins/DeepCL,FighterLYL/DeepCL,hughperkins/DeepCL,MiniLight/DeepCL,Peilong/DeepCL,FighterLYL/DeepCL,FighterLYL/DeepCL,FighterLYL/DeepCL,MiniLight/DeepCL,MiniLight/DeepCL,hughperkins/DeepCL,Peilong/DeepCL,hughperkins/DeepCL,Peilong/DeepCL,Peilong/DeepCL