* 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.
* Updated keylist to use bool and stdint value for key not found.
* Added Keylist_Index_Key to deprecate Keylist_Key function
* Changed the deprecated Keylist_Key API to Keylist_Index_Key
* Added unit test for Keylist_Index_Key API
* Added Binary Lighting Output object example.
* Changed piface example app to support binary-lighting-output object type and blink warn
* Changed example device object to not create objects when device object-table is overridden
* Fixed unit testing for device object
Steve Karg