Fix the crash at shut down caused by forgetting to release the global events table object.

Include the fixes from the routines that should've been commited into the previous commit.
Take a more exception safe approach to unbinding from server events at shutdown.

source/CoreUtils.cpp

@@ -308,6 +308,7 @@ void Core::DropEvents()
     ResetSignalPair(mOnServerOption);
     ResetSignalPair(mOnScriptReload);
     ResetSignalPair(mOnScriptLoaded);
+    m_Events.Release();
 }
 
 } // Namespace:: SqMod