cv::Mat to CDenseFeature conversion Factory and vice versa.

I have made a factory which directly converts any cvMat object into any(required) type of CDenseFeatures. 
and  CDenseFeature<float64_t> into the required type of cvMat (any)
same thing lets drop the multiple methods, it was cool and worth experimenting with but there is no reason anyone would want to use something other than memcpy