add image augmentation for csv dataloader

[TomonobuTsujikawa]

Introduce normalize and augment images provided by csv dataset.
Here is the example of json.
Currently, augmentation type can be selected from imagenet and cifar10.

"dataloader": {
    "csv": {
        "train_portion": 0.96,
        "train_file": "ilsvrc-train.csv",
        "valid_file": "ilsvrc-test.csv",
        "train_cache_dir": "ilsvrc-train.cache",
        "valid_cache_dir": "ilsvrc-test.cache",
        "augmentation": {
            "type": "imagenet"
        }
    }
},

Also, input_shapes should be set actual input image size like [3, 320, 320] or [3, 480,480].