Adding RandAugment to AutoAugment impl, some tweaks to AA included

Author: rwightman

timm/data/__init__.py

@@ -4,3 +4,5 @@
 from .transforms import *
 from .loader import create_loader, create_transform
 from .mixup import mixup_target, FastCollateMixup
+from .auto_augment import RandAugment, AutoAugment, rand_augment_ops, auto_augment_policy,\
+    rand_augment_transform, auto_augment_transform