Added a resistor to the layout in Piezo Speaker and gave it a correct value. Gave a correct value to the resistors in the other four layouts.
Added NewTone library to repo for easy access. It is required for the Arduino Leonardo so it plays tones correctly. This is due to the way timers are used in the Leonardo's mega32u4.
Moved the breadboard in Arduino Class LED with Switch to better align with the other layouts.
Moved piezo speaker connection to pin 12 to match ThreeSegmentSimon
I forgot that the Arduino IDE forces each sketch to be in its own folder.
Cleaned up the layout a bit.
Updated the README