* Added dependent BACnet stack headers into bacdef.h file.
* Changed bacdef.h and other stack includes in c/h files to have a common pattern.
* Moved bits.h, bytes.h, and bacnet_stack_exports.h under bacnet/basic/sys/ folder.
* refactor write-property tag check
* modify ports objects to use write-property tag check API
* modify example objects to use write-property tag check API
* Fix object unit test builds
* Fix and run unit ztests via CMake
* Enable unit testing on Travis CI
Co-authored-by: Steve Karg <skarg@users.sourceforge.net>
* Feature/bacnet unsigned 64 bit
* Added ACCUMULATOR object
* removed or modified stdint.h since we use at least C99 standard compilers.
* CMake: Add BACDL_NONE.
Steve Karg