add code bender instructions
Merge pull request #129 from sandeepmistry/arduino

codebender.cc instructions for Arduino firmware
Rename physical_web.org to org.physical_web
Merge pull request #133 from schilit/rename-branch

Rename physical_web.org to org.physical_web
LGTM. Merging.
Merge branch 'master' of https://github.com/google/physical-web into feature
Use onClick for the button

Fragments don’t have an easy way to use XML onClick