Train on Large Plant Dataset

[mattmotoki]

Train a local keras model on:

• PlantNet 2017 Dataset: Consists of 10,000 species of plants ().
• Oxford 17 Category Flower Dataset: Consists of 17 flower categories with ~80 images for each category (1,361 images).
• Oxford 102 Category Flower Dataset: Consists of 102 flower categories. Each category consists of between 40 and 258 images (8,189 images).