Added new section for YUN in the arduino platform docs and subsection for hacking the yun into running cylon.
Added new example for setDataStreamming and updated locator example to the new correct form
Add example to correct folder.
Adding example to sphero links.
Add correct file extension for example.
Updated example to use the correct format and fix typo in name.
add arduino-yun image
Merge pull request #16 from hybridgroup/yun-docs

Added subsection for Arduino Yun.