Saving attributes, their scores and setting parameter to extract K regions

[nilinykh]

Hello @endernewton and @vedanuj,

I was curious if you are planning to adjust the code for storing attributes and their scores as well. I am talking about the pull request #3.
As far as I can see, at the moment the code does not output attribute probabilities and attributes themselves.

Also,

maybe worth adding an option of "K" which stands for extracting the top K region features, I think this is useful for a lot of papers that choose top 36, or varying size from 36-100 (maybe another option is needed there)

is there a quick way to set the K number of extracted regions to the desired parameter? In particular, 36, as it says in the comment.

Thank you.