Added Procesesing base code

This code is from the Temperature clock project. I am going to use the
serial code as a base for the communication between the Arduino and the
computer
Added descriptions, synchronization, code diffs

Pot to LED
 - Add tutorial .md file. This has only introduction. I will add more
when I know what the intro programming class include

Light Sensor to LED
added tutorial 2 - 1st draft
added code differences between tutorials 1 and 2

Light Sensor to Servo
added tutorial 3 - 1st draft
added code differences between tutorials 2 and 3

Ultrasonic Sensor to Servo
added tutorial 4 - outline
tested - got example working but when i tested with servo there was a
noise problem—> I need to add filter cap etc
added code differences between tutorials 3 and 4
Ultrasonic Sensor to Computer
added tutorial 5 outline
Tutorials, markdown formatting, fritzing

Finished tutorials 4 and 5
Checked markdown formatting in browser
created fritzing docs for all circuits
finished code diff docs —> exported to pdfs for viewing