Feature/bacnet unsigned integer 64 bit (#47)

* 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.

src/bacnet/lso.h

@@ -41,6 +41,7 @@ extern "C" {
         BACNET_CHARACTER_STRING requestingSrc;
         BACNET_LIFE_SAFETY_OPERATION operation;
         BACNET_OBJECT_ID targetObject;
+        bool use_target:1;
     } BACNET_LSO_DATA;