Log onSwipeComplete name correctly
Check for onReaderConnected callback correctly
readerIsConnected calls correct callback
Name callback-setting functions appropriately

e.g. "startOnReaderConnecting" => setCallbackOnReaderConnecting; it sets a callback for the onReaderConnecting event.

Also adding a dummy callback function for the error callbacks; many of these events were never calling an error callback, so it doesn't make sense to pretend to set it.
Do not call callback functions when setting them

Each of the callback-setting functions was also, inexplicably, calling the callback itself, in addition to setting the callback id. So when you'd setCallbackOnReaderDisconnected, it would call the callback indicating the reader was disconnected.