thermostat 1.2.0

Thermostat.rb is an attempt to build an easy to use ruby api around the web services provided by the Proliphix line of network thermostats. Their API is documented at http://www.proliphix.com/Documentation.aspx. The code is tested on the NT20e unit, which is what I own (the NT10e is the same hardware, just can't handle remote sensors). It should react that same across all their network accessible units.