Added BACnet/IPv6 datalink layer and example BACnet/IPv4 to BACnet/IPv6 router.
BVLC6 layer is working on Linux port without BBMD features yet. Win32 is implemented, untested.
Tested during BACnet North American Plugfest 2016.
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Added checks for OPTIONAL context tagged decoding to be sure it is not a closing tag.
Added makefile for unit test in bacdevobjpropref.c module, and improved unit test.
https://sourceforge.net/p/bacnet/bugs/49/
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Added Positive Integer Value and makefile for building unit tests.
Added OctetString Value and Positive Integer Value to unit test make file.
Thank you, Nikola Jelić!
Added Multi-state Value object example and unit tests, and added to demo/server example application.
Fixed Analog Input object, Analog Output object, Analog Value object, Device object, Multi-state Input object, Multi-state Output object examples to return correct error codes for WriteProperty service (per BACnet 135.1-2009-9.22.2.6).
Fixed top level ReadProperty and WriteProperty handlers in Device object to return correct error codes (per BACnet 135.1-2009-9.22.2.5)