Results 2 issues of JunBae

I train `./experiments/scripts/faster_rcnn_end2end.sh 0 VGG16 pascal_voc`. if just run, error message is ![default](https://user-images.githubusercontent.com/24247768/34847096-96947b84-f75d-11e7-9b94-a6796991219e.PNG) so, I fixed `faster_rcnn_end2end.sh` ITERS=2000000 ->500 then it worked. big ITERS occur error small ITERS not occur...

I run `demo_img.py` then, ![demo](https://user-images.githubusercontent.com/24247768/34840045-20e11ee4-f747-11e7-8ed1-db53071e663e.PNG) 4 images are saved in tools/img folder, but `demo_img.py` is load 1 image. furthermore, after show 1 image then stop terminal, so I reboot terminal....