Add NewPool, fix some typos and add clarification on Bindings not be…

[schwartzmx]

…ing supported by AWS Neptune

closes #2

@shutcode is this something along the lines of what you were thinking? Trying to make this extensible if new configuration is added for configuring the Pool. I'm definitely open to refactoring this as I think initializing the Pool and client is a bit clunky and verbose, having to deal with Ws dialers and configs.