python: major rewrite with more full-featured edge node examples

[jbrzozoski]

Includes:

• packaging config using setuptools
• regenerated the pb2 files with the current protobuf definition and libprotoc 3.6.1
• convert all tabs to spaces
• beautify all code according to PEP8
• updated examples to match new usage

[jbrzozoski]

I still need to clean up things like the PyPi package name, etc... But, this works.