Squashed '3_ArduinoBasics/' changes from 67b167a..27be473

27be473 Update readme.md
7589f1e Update readme.md

git-subtree-dir: 3_ArduinoBasics
git-subtree-split: 27be4731bd2d2636860bfba2d06f430904868cda
updated subtree 3_ArduinoBasics 2013.06.23.02.54