Some Python dependencies must be installed twice in order to use the examples

[ccooper21]

Since the Python dependencies for the AWS Lambda service are being installed into a special directory, cloudvision/vendored, such that they will get deployed by Serverless, they are not available for use by the included examples. I found that I had to install both the requests and Pillow packages in order for the examples to be used, as follows:

pip install requests Pillow

[ramhiser]

@ccooper21 Good point. I glossed over that detail -- I'll add a note to the README.