Add colab notebook scripts.

gdrive_connect.py

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+from google.colab import drive 
+drive.mount('/content/gdrive', force_remount=True)

gpu_detect.py

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+import tensorflow as tf
+device_name = tf.test.gpu_device_name()
+if device_name != '/device:GPU:0':
+  raise SystemError('GPU device not found')
+print('Found GPU at: {}'.format(device_name))