Squashed '3_ArduinoBasics/' changes from b9a1a99..0a2bcfb

0a2bcfb Update readme.md
ab02099 Update readme.md
673df43 Update readme.md
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git-subtree-dir: 3_ArduinoBasics
git-subtree-split: 0a2bcfbe47668caa9a9ac1b67eb360a60c8a4539
updated subtree 3_ArduinoBasics 2013.06.22.20.30