* improved property map object with prototype functions along with item type per capability enforcement
* updated alexa response property state accuracy logic with ability to associate an item sensor through metadata parameter
* added ability to define lock property state mapping when using an item sensor through metadata parameter
* updated temperature mode binding mapping to differentiate legacy bindings from latest one
* refactored rest functions code to accomodate for future alexa gateway calls
* changed the lambda function return method to use handler callback instead of context
* updated report state function to use generic alexa response property state logic