Added switch to get git hash and branch name

src/mainwidget.cpp

@@ -134,7 +134,7 @@ void MainWidget::showAboutDialog()
 
     about.setText(QString("QCMA ") + QCMA_VER);
     about.setWindowTitle(tr("About QCMA"));
-#ifndef BUILD_HASH
+#ifndef QCMA_BUILD_HASH
     about.setInformativeText(tr("Copyright (C) 2013  Codestation") + "\n");
 #else
     about.setInformativeText(tr("Copyright (C) 2013  Codestation\n\nbuild hash: %1\nbuild branch: %2").arg(BUILD_HASH).arg(BUILD_BRANCH));