v0.1.0 new features

- major refactoring for json-proxy to be both express middleware
  and offer a cli

- more robust configuration options, including fallback from
  hard coded config values, to command line options, to
  config file options, to environmental variables, to
  defaults

- proper support for `npm -g` installs

- implemented mocha unit test and jshint linting

- includes examples for both the cli and middleware