Merge branch '0.6.0.x' into 0.6.x

Conflicts:
	.gitignore
	src/bitcoinrpc.cpp
	src/main.cpp
	src/qt/bitcoingui.cpp
	src/ui_interface.h
	src/util.cpp

src/main.cpp

@@ -1835,7 +1835,7 @@ bool CheckDiskSpace(uint64 nAdditionalBytes)
         strMiscWarning = strMessage;
         printf("*** %s\n", strMessage.c_str());
         ThreadSafeMessageBox(strMessage, "Bitcoin", wxOK | wxICON_EXCLAMATION | wxMODAL);
-        QueueShutdown();
+        StartShutdown();
         return false;
     }
     return true;