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/wp.h

@@ -38,7 +38,8 @@ typedef struct BACnet_Write_Property_Data {
     uint32_t object_instance;
     BACNET_OBJECT_TYPE object_type;
     BACNET_PROPERTY_ID object_property;
-    uint32_t array_index;       /* use BACNET_ARRAY_ALL when not setting */
+    /* use BACNET_ARRAY_ALL when not setting */
+    BACNET_ARRAY_INDEX array_index;
     uint8_t application_data[MAX_APDU];
     int application_data_len;
     uint8_t priority;   /* use BACNET_NO_PRIORITY if no priority */