Al Nejati

In [polymorphism.jl](https://github.com/benmoran/TensorFlow.jl/blob/master/examples/polymorphism.jl#L47), should the following code: ``` julia for i in 1:batch_size y_one_hot[y, i] = 1. end ``` instead be: ``` julia for i in 1:batch_size y_one_hot[y[i], i] = 1....