Fix bug that prevents default address override

#26 describes the bug, #25 closes it.

Default address can now be overridden when passing value into BotTester options

Add TestConnector

Created TestConnector to silence logs to the console during tests

optional config file and random response ordering

• options can be passed into the BotTester constructor in the last param or via a bot-tester.json file in the root directory.

• Currently, the two supported fields are timeout and defaultAddress, but more may come down the line.

• responses can be expected without an particular ordering with sendMessageToBotIgnoringResponseOrder

• Coverage and linting has been added and will block builds.

Fix undefined expected responses bug

sendMessageToBot('something', undefined) caused a bug, filter out these cases