Inconsistencies in W, H order

[guillermo-gabrielli-fer]

Hello, while using the code in this repository I noticed an issue with the width and height parameters that impacts rectangular-shaped models:

1 - In client.py the shape is being passed as NCWH, rather than NCHW, which doesn't seem correct.

2- In preprocess the code clearly expects input_shape to be [height, width], while is being passed as [width, height] from client.py

3- In postprocess input_shape is used in a way that it's consistent to [width, height], based on the coordinates passed to BoungingBox ctor and the scaling. This is consistent with how they are being passed, but inconsistent with the preprocess method.

[levipereira]

Thank you very much, I will fix this!