Add go-opencv binding comparing.

Hi,

I would like to add [go-opencv](https://github.com/lazywei/go-opencv) into comparing candidate.

I need some help with what to return in the resizing function. Therefore, I open this pull request and want to start the discussion. Thanks.

Here is the benchmark I got for OpenCV
```
magickwand_box took 343.293996ms, file average 49.041999ms
imaging_Box took 973.294221ms, file average 139.042031ms
Nfnt_NearestNeighbor took 3.231306082s, file average 461.615154ms
OpenCv took 248.871481ms, file average 35.553068ms
```