Android beacon example

moved from https://github.com/google/physical-web/tree/357aa7040670b5f672035fc9e8189a16be532af5/firmware/android
Merge pull request #19 from don/android-beacon

Android beacon example.

Thanks!
move Arduino beacon from http://github.com/google/physical-web/firmware/arduino
nodejs example

moved from https://github.com/google/physical-web/tree/e5f8cc6a56b04bc39f4dd78859ed0779105bbf49/firmware/nodejs

See https://github.com/google/physical-web/issues/185
Merge pull request #22 from don/move-nodejs-beacon

nodejs example

thanks!
Merge pull request #21 from sandeepmistry/arduino

move Arduino beacon from physical-web repo

thanks!