Created by: littletomatodonkey

1. add mstest in cascadeclsaware, Based on cascade_rcnn_cls_aware_r101_vd_fpn model, coco mAP is improved from 43.9%(800x1333 test, standard nms ) 46.5%( ms test, the same method as cascade_rcnn_r50_fpn_1x_ms_test.yml )
2. remove unused code in cascade_rcnn.py
3. Solve the feature request in #293 (closed)