Change the evaluation to a multi query shot

[jpainam]

@hehefan Can i use the same pretrained model for multi shot query setting or need to re write some part of your code. Can you provide us with a mutli query evaluation example?

[hehefan]

Hi @jpainam, I do not intend to implement the multi-query evaluation code. You can find it in the page http://www.liangzheng.com.cn/Project/project_reid.html