More robust serial connection establishment & error handling #55
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Instead of trying to establish the serial connection in the Board constructor, delegate this to a separate `setup()`. (**API change**!) This allows the user to add listeners to the Board’s `error` event, which signifies that the connection could not be established. (This was already intended, but wasn't possible, as far as I can tell.) Also displays a more intuitive error message.
`setup()` returns `this`, which allows for an easier transition from old code: ``` var board = new arduino.Board(); // old var board = new arduino.Board().setup(); // new ```
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Instead of trying to establish the serial connection in the Board constructor, delegate this to a separate
setup(). (API change!)This allows the user to add listeners to the Board’s
errorevent, which signifies that the connection could not be established. (This was already intended, but wasn't possible, as far as I can tell.)Also displays a more intuitive error message.