Centralize the name of the application being updated in AppInfo.h

Also add AppInfo.h missing from previous commit.

src/AppInfo.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <string>
+
+class AppInfo
+{
+	public:
+		static std::string name();
+		static std::string appName();
+};
+
+inline std::string AppInfo::name()
+{
+	return "Mendeley Updater";
+}
+
+inline std::string AppInfo::appName()
+{
+	return "Mendeley Desktop";
+}
+

src/UpdateDialogAscii.cpp

@@ -54,7 +54,7 @@ void UpdateDialogAscii::updateProgress(int percentage)
 void UpdateDialogAscii::updateFinished()
 {
 	m_mutex.lock();
-	m_output << "\nUpdate Finished.  You can now restart Mendeley Desktop." << std::endl;
+	m_output << "\nUpdate Finished.  You can now restart " << AppInfo::appName() << "." << std::endl;
 	m_mutex.unlock();
 }