adding CI status to README
adding BaseConfig for taking care of name, getting and checking for existence of keys
extending BaseConfig and adding code to ensure setting key must always be a string
adding untested immutable config implementation
changing to extend ImmutableConfig, adding docs
adding Traversable to Config interface
test stub for mocking Config interface
adding test for setting non string keys to mutable configs
getting just enough on appconfig to pass existing tests
Merge branch 'development'