multiple climaduinos over a home network

Enhanced to work with multiple zones (Climaduinos) communicating over a
network. The Climaduinos need to be running modified code to
communicate over Ethernet using a wiznet-based Ethernet shield (or over
WiFi at a future date).
additional changes

Additional changes to get this closer to supporting multiple zones.
Programming Sentry changes DB record

Program Sentry changes DB record. The Climaduino will get the new
setting once it sends its readings and parameters.
Changes for Arduino Yún. Taking advantage of Key/Value store instead. Instead of Climaduinos polling the controller, the controller polls the Climaduinos. It also has the ability to push setting changes much more quickly than having to wait for the next Climaduino polling interval.
Removed *.pyc and created a .gitignore file
Merge branch 'release/Multizone-Yún-0.01'