Fix typo (#3)

* fix typo on numpy import

README.md

@@ -65,7 +65,7 @@ Dataflux Dataset for PyTorch offers the flexibility to transform the downloaded
 # Assume that you have a bucket with image files and you want
 # to load them into Numpy arrays for training.
 import io
-import numpy as np
+import numpy
 from PIL import Image
 
 transform = lambda img_in_bytes : numpy.asarray(Image.open(io.BytesIO(img_in_bytes)))