Updated help documentation
Updated help documentation

bearpaw/mexopencv,fengzhyuan/mexopencv,fengzhyuan/mexopencv,ninghang/opencvmex,CVML/mexopencv,bearpaw/mexopencv,nanit/mexopencv,nanit/mexopencv,ninghang/opencvmex,CVML/mexopencv