Feature/alarm ack application (#164)

* Added alarm-ack application

* fix error and simple ack handling for event notification

* Added ack-alarm application

* Update CMake for ack-alarm

* update example objects for alarm and events

* Allow repeated ack-alarm for same transition

* add event state API. Fix COV event state.

* add event state API to AV. Fix COV event state.

* Use event time for ack notification

* Enable notifications for all transitions by default. For testing.

* Use unconfirmed device notification to 4194303 for testing.

* initialize local vars

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

src/bacnet/datetime.h

@@ -299,6 +299,15 @@ extern "C" {
         int16_t utc_offset_minutes,
         int8_t dst_adjust_minutes);
 
+    BACNET_STACK_EXPORT
+    bool datetime_date_init_ascii(
+        BACNET_DATE *bdate,
+        const char *ascii);
+    BACNET_STACK_EXPORT
+    bool datetime_time_init_ascii(
+        BACNET_TIME *btime,
+        const char *ascii);
+
     BACNET_STACK_EXPORT
     int bacapp_encode_datetime(
         uint8_t * apdu,