push to fix the code on python3 and opencv3

[DeepInDeeper]

1. xrange to range
2. cPickle to pickle
3. print : add brackets
4. add --file_name args

[rajendraarora16]

@PeterChenYijie Thanks for raising this PR. I was doing the same thing.
Just have one concern. Did you try playing around with own weight files instead of pre-defined weight files?

[DeepInDeeper]

@rajendraarora16 I am still working on it.Until now I just follow this to train VOC2007 DataSet. Besides,I try to do some changes in the VOC2007 DataSet's (such as change car data to cupdata) for simple test.Perhaps I will try my own data in next weeks. Anyway, If you have any good idea,I also fully expect you to tell me.Thanks.

[Jackyangyang]

When I run train.py I get this error

File "X:/work/work/14_YOLO_series/yolo_tensorflow/train.py", line 90, in train
train_timer.remain(step, self.max_iter))
ValueError: Unknown format code 'f' for object of type 'str'