Implement missing data types for calendar and schedule (#474)

* Added the SpecialEvent struct for the Exception_Schedule property of Schedule, encode/decode/same functions, unit tests, and integrated into bacapp functions.

* Added the CalendarEntry struct for the Date_List property of Calendar and the SpecialEvent struct, encode/decode functions, unit tests, and integrated into bacapp functions.

* Added the DateRange struct for the Effective_Period property of Schedule, encode/decode functions, unit tests, and integrated into bacapp functions.

---------

Co-authored-by: Steve Karg <skarg@users.sourceforge.net>

ports/at91sam7s/CMakeLists.txt

@@ -164,6 +164,8 @@ set(BACNET_PROJECT_SOURCE
     ${LIBRARY_BACNET_CORE}/timestamp.c
     ${LIBRARY_BACNET_CORE}/weeklyschedule.c
     ${LIBRARY_BACNET_CORE}/dailyschedule.c
+    ${LIBRARY_BACNET_CORE}/calendar_entry.c
+    ${LIBRARY_BACNET_CORE}/special_event.c
     ${LIBRARY_BACNET_CORE}/bactimevalue.c
     ${LIBRARY_BACNET_CORE}/whohas.c
     ${LIBRARY_BACNET_CORE}/whois.c

ports/at91sam7s/Makefile

@@ -115,6 +115,8 @@ CORESRC = $(BACNET_CORE)/abort.c \
 	$(BACNET_CORE)/weeklyschedule.c \
 	$(BACNET_CORE)/dailyschedule.c \
 	$(BACNET_CORE)/bactimevalue.c \
+	$(BACNET_CORE)/calendar_entry.c \
+	$(BACNET_CORE)/special_event.c \
 	$(BACNET_CORE)/whohas.c \
 	$(BACNET_CORE)/whois.c \
 	$(BACNET_CORE)/wp.c