Add in BACnet schema

The schema will need revised based on the new addendum am, but at this point just need to get the module working ...

ref: www.bacnet.org

Three New Addenda Published! (5/16) Atlanta, GA. The standard addenda listed below are now available for free download. These addenda make up protocol Revision 19 of the BACnet standard and are the last addenda to Standard 135-2012. They will be an integral part of the upcoming consolidated BACnet Standard 135-2016, soon to be published.

Addendum 135-2012am Extend BACnet/WS with RESTful web services for complex data types and subscriptions, extract the data model from Annex Q into a separate common model, rework of Annex Q to be an XML syntax for the common model, add a JSON syntax for the common model, deprecate Annex N SOAP services and add a migration guide, and change Clause 21 identifiers to use a consistent format.

Addendum 135-2012ba Add CSML based descriptions of BACnet devices, add Semantic Tags to all objects, extend Structured View object to contain semantic information on subordinates, and add data revisioning capabilities to CSML.

Addendum 135-2012bc Extend BIBBs for Primitive Value objects, add new BIBBs for event enrollment and subscription, amend B-AWS related BIBBs for revised event reporting, add life safety BIBBs and device profiles, add physical access control BIBBs and device profiles, and add an All-Domain Advanced Workstation (B-XAWS) device profile.