some minor mistakes of the code.

1. Image Normalization according to ```imagenet_mean.binaryproto```.
2. Age Estimation computing mistake.
Your code:
```python
def expected_age(vector):
    res = [(i+1)*v for i, v in enumerate(vector)]
    return sum(res)
```
but in the paper:
<img src="https://latex.codecogs.com/gif.latex?E(O)=\sum_{i=0}^{100}&space;y_{i}&space;o_{i}" title="E(O)=\sum_{i=0}^{100} y_{i} o_{i}" />