GH-721 Redo internal NetJob implementation.

NetJob is now using its own task queue and does not start more than 6 actions at the same time

logic/QObjectPtr.h

@@ -0,0 +1,52 @@
+#pragma once
+
+#include <memory>
+
+/**
+ * A pointer class with the usual shared pointer semantics intended for derivates of QObject
+ * Calls deleteLater() instead of destroying the contained object immediately
+ */
+template <typename T>
+class QObjectPtr
+{
+public:
+	QObjectPtr(){}
+	QObjectPtr(T * wrap)
+	{
+		reset(wrap);
+	}
+	QObjectPtr(const QObjectPtr<T>& other)
+	{
+		m_ptr = other.m_ptr;
+	}
+
+public:
+	void reset(T * wrap)
+	{
+		using namespace std::placeholders;
+		m_ptr.reset(wrap, std::bind(&QObject::deleteLater, _1));
+	}
+	void reset()
+	{
+		m_ptr.reset();
+	}
+	T * get() const
+	{
+		return m_ptr.get();
+	}
+	T * operator->() const
+	{
+		return m_ptr.get();
+	}
+	T & operator*() const
+	{
+		return *m_ptr.get();
+	}
+	operator bool() const
+	{
+		return m_ptr.get() != nullptr;
+	}
+
+private:
+	std::shared_ptr <T> m_ptr;
+};