Merge pull request #1439 from Diapolo/ClientShutdown

re-work Shutdown() function

src/qt/bitcoin.cpp

@@ -290,6 +290,7 @@ int main(int argc, char *argv[])
                 window.setWalletModel(0);
                 guiref = 0;
             }
+            // Shutdown the core and it's threads, but don't exit Bitcoin-Qt here
             Shutdown(NULL);
         }
         else