Holy Moly - has SmartThings come a long way

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[OBSOLETE] Honeywell / Ademco Vista 20P Integration

While there are a bunch of integration options for the DSC / Honeywell / Ademco alarm panels, none quite fit my needs: keep traffic on my local LAN, offer async updates and are easy to install and configure. At the risk of offering yet another Envisalink integration option, set out to solve this and hopefully help others. Obviously leveraged much of the good work from kholloway, MattTW and oehokie. Provides integration support for a Honeywell / Ademco Vista 20p alarm panel, connected to an Envisalink 3/4 module over local LAN (or AlarmDecoder AD2USB), supports automatic zone discovery, asynchronous status updates with support for the following zones and actions; Zone Support Door, Window Contact Motion Sensor Smoke Detector Actions Arm Stay Arm Away Instant Arm Disarm Chime Zone Bypas…