Switch to using napoleon for generating code documentation.
Switch to using napoleon for generating code documentation.

Napoleon adds support for Google style docstrings to sphinx which are
what we use in faucet.

shivarammysore/faucet,REANNZ/faucet,REANNZ/faucet,anarkiwi/faucet,trentindav/faucet,trungdtbk/faucet,gizmoguy/faucet,shivarammysore/faucet,trungdtbk/faucet,anarkiwi/faucet,wackerly/faucet,mwutzke/faucet,faucetsdn/faucet,gizmoguy/faucet,faucetsdn/faucet,wackerly/faucet,trentindav/faucet,mwutzke/faucet