minor error, predict_op definition missed in pokemonclassifier.py

[masszhou]

1. predict_op definition missed in pokemonclassifier.py

there is only inference_predict_op for model_base64_input type

inference_logits = inference(model_base64_input)
inference_predict_softmax = tf.nn.softmax(inference_logits)
inference_predict_op = tf.argmax(inference_predict_softmax, 1)

missed predict_op for x type

predict_softmax = tf.nn.softmax(logit)
predict_op = tf.argmax(predict_softmax, 1)

2. typo error in README

in section Inference

./pokemon_classifer.py --mode inference --image ./data/inference/Pikachu.png

should be

./pokemon_classifier.py