IFF_Multi_Queue, Arduino router example, Readme Changes

[TMRh20]

• Added define for IFF_MULTI_QUEUE
• Added options 2,3 to select addressing of 00(RPi), 02 (Arduino), and 012 (RPi)
• Added libboost install info to readme (Markdown/Formatting is my nemesis)

[reixd]

Yeah, Markdown formatting is not always easy... I prefer dokuwiki formatting.