Send byte array from serial-monitor

Add the ability to send an array of bytes from the serial-monitor.
You write them using a comma separated list of hex, oct, dec or binary numbers.
It gives an error when the string is malformated.
In this case a new exception, ByteStringException, occures which is getting caught.

![arduino 1](https://f.cloud.github.com/assets/1176649/146075/52fee18e-747c-11e2-80a1-4961cec0f674.png)
![arduino 2](https://f.cloud.github.com/assets/1176649/146076/55ac7a4a-747c-11e2-8516-1e13e5132632.png)
![arduino 3](https://f.cloud.github.com/assets/1176649/146077/57f7d934-747c-11e2-82a2-83b5be228966.png)
![arduino 4](https://f.cloud.github.com/assets/1176649/146078/5a65f7a0-747c-11e2-8894-96b5466d45e1.png)
![arduino 5](https://f.cloud.github.com/assets/1176649/146080/5c65a974-747c-11e2-98e4-7f0ec3783b60.png)
![arduino 6](https://f.cloud.github.com/assets/1176649/146081/5ec19b7e-747c-11e2-8211-8811858ff9da.png)