ni-c/heimcontrol.js#2

decimal RC code support

decimal RC code support

Fixed problem with single digit pins

ni-c/heimcontrol.js#2

Conflicts:
	examples/rc.js
	index.js
	lib/board.js
	lib/rc.js
	package.json
	src/du.ino

Instead of having both `src/du.ino` (old, invalid path) and
`src/duino/duino.ino` (new), make the former a symlink to the latter.

(The Arduino IDE requires this folder format.)

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
```

Various changes from Upstream

This was preventing digitalWrite and analogWrite from working

Fix String Processing