Initial Push of Arduino Sample Apps

Initial Push of Arduino Sample Apps

Right now, tokens are messed up. I cannot get Observe operation to
function properly on Linux or Arduino.

Right now, here is the Arduino server only.

Patch Set 2: Removed "local.properties." This file should NEVER be
committed.

Patch Set 4: Made changes to READMEs as proposed by Bill Dieter.

Patch Set 5-7: Rebases

Path Set 8: Updated stack files to build for Arduino as well.
Arduino compiler is a little bit more per-snickety than the linux compiler.

Change-Id: I21b9396d1d22b9189db65ef31d4528720b01c5b9