closes #3:  Provide a reference to a logger in the result that is prefixed with the name of the config file. enhancement.
preparing for 1.1.0
closes #4:  error when config isn't found: log is not a function. bug.
closes #5:  Enable error, info, and warn by default. enhancement.
closes #7:  Config not found error should show path to config. bug.
preparing for 1.2.1