py_caffe_feat_extract

[lichengunc]

I think the bicubic implementation is of some problem.

The output image contains some obvious artifacts if you visualize it.
It's definitely not same as Matlab's imresize nor Opencv's resize(Inter_cubic).

I guess the vgg_feats.mat inside examples_images was produced by this function.
The results made by py_caffe_feat_extract were also slightly different with the ones made by opencv's resize(cubic).
Hope some one could fix the bug of the bicubic implementation some day.

Thanks a lot.