Feature/refactor-apps-string-parsing (#1152)

* Added bacnet_str functions for parsing various numeric strings.

* Renamed BACnet string API to be clearer when no stdlib function exists.

* Fixed  incompatible types - from 'BACNET_UNSIGNED_INTEGER *' to 'unsigned long *'  warning

* Changed bacnet-str-to functions to use ERANGE for error detection.

* Refactored some apps to use common string parsing for BACnet data types.

* Refactor bacapp_parse_application_data to use bacnet_string_to_unsigned for better clarity

* Added strtol for BACnetEventType.

src/bacnet/event.h

@@ -471,6 +471,10 @@ int uevent_notify_send(
     BACNET_EVENT_NOTIFICATION_DATA *data,
     BACNET_ADDRESS *dest);
 
+BACNET_STACK_EXPORT
+bool event_notify_parse(
+    BACNET_EVENT_NOTIFICATION_DATA *data, int argc, char *argv[]);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */