Based on slack discussion, pass arguments from launcher to started application

https://swift-project.slack.com/archives/C04J6J76N/p1504449711000040

* utility functions in CApplication and CNetworkVatlib for cmd args
* a.addVatlibOptions() in launcher
* function CSwiftLauncher::startDetached to unify startup and simplify debugging

src/swiftlauncher/swiftlauncher.h

@@ -67,6 +67,10 @@ public:
     //! Current command line
     QString getCmdLine() const;
 
+    //! Start currently set application detached
+    //! \remark simplifies debugging
+    bool startDetached();
+
 protected:
     //! \copydoc QDialog::mousePressEvent
     virtual void mousePressEvent(QMouseEvent *event) override;