Several fixes for Mac

These fixes should be useful for all, even non-Mac.

They relate to either forgotten #includes, forgotten override keywords, or forgotten const keywords. They all caused compilation errors in my MacBook.

cmake_modules/wolfConfig.cmake

@@ -11,7 +11,7 @@ ENDIF(wolf_INCLUDE_DIR)
 
 FIND_LIBRARY(
     wolf_LIBRARY
-    NAMES libwolf.so
+    NAMES libwolf.so libwolf.dylib
     PATHS /usr/local/lib/iri-algorithms)
 IF(wolf_LIBRARY)
   MESSAGE("Found wolf lib: ${wolf_LIBRARY}")