Allow the user to set a serial port in board options

[theycallmeswift]

I've run into a few issues where the serial port is not properly detected by Johnny-five and right now there is no easy way to set the correct port through the options hash. I've been doing something similar over in BreakfastSerial.

Ex.

var board = new Board({ port: "/dev/tty.usbfoo1234" });

Thoughts?

[rwaldron]

Exciting!

As soon as firmata/firmata.js#17 is resolved, I will land this :D

[theycallmeswift]

Cool. The whole constructor could use a refactor. It's a little hard to follow right now. I'll work on that once these two go in.

[rwaldron]

Thanks, that sounds good.

In the meantime, would you mind fixing up the style (whitespace, etc) to match the rest? Thanks!

(usually I just do that myself, but I figured I'd ask anyway :D )

[theycallmeswift]

I think I did a pretty good job of matching your style. If you see any glaring issues, let me know - I'm happy to fix them.

[theycallmeswift]

Only exception being the self stuff, which I find easier to deal with when you're dealing with nested binding callbacks.

[theycallmeswift]

Yay! Glad this went in. Thanks!

[rwaldron]

Thanks me? No! Thank you! ...for writing the patch to add the support :)