Move a good chunk of the singleton objects into a new QApplication subclass.

logic/InstanceLauncher.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <QObject>
+
+class MinecraftProcess;
+class ConsoleWindow;
+
+// Commandline instance launcher
+class InstanceLauncher : public QObject
+{
+	Q_OBJECT
+	
+private:
+	QString instId;
+	MinecraftProcess *proc;
+	ConsoleWindow *console;
+	
+public:
+	InstanceLauncher(QString instId);
+	
+private slots:
+	void onTerminated();
+	void onLoginComplete();
+	void doLogin(const QString &errorMsg);
+	
+public:
+	int launch();
+};