Added support for passing in ArgumentParser in Viewer and CompositeViewer constructor

include/osgViewer/CompositeViewer

@@ -14,6 +14,7 @@
 #ifndef OSGVIEWER_CompositeViewer
 #define OSGVIEWER_CompositeViewer 1
 
+#include <osg/ArgumentParser>
 #include <osgViewer/GraphicsWindow>
 #include <osgViewer/View>
 
@@ -25,6 +26,9 @@ class OSGVIEWER_EXPORT CompositeViewer : public osg::Referenced
     public:
 
         CompositeViewer();
+
+        CompositeViewer(osg::ArgumentParser& arguments);
+
         virtual ~CompositeViewer();
 
         void addView(osgViewer::View* view);
@@ -160,7 +164,10 @@ class OSGVIEWER_EXPORT CompositeViewer : public osg::Referenced
 
     protected:
 
+        void constructorInit();
+
         void init();
+
         void checkWindowStatus();
 
         typedef std::vector< osg::ref_ptr<osgViewer::View> > Views;

include/osgViewer/Viewer

@@ -14,9 +14,11 @@
 #ifndef OSGVIEWER_Viewer
 #define OSGVIEWER_Viewer 1
 
+#include <osg/ArgumentParser>
+#include <osgGA/EventVisitor>
 #include <osgViewer/GraphicsWindow>
 #include <osgViewer/View>
-#include <osgGA/EventVisitor>
+
 
 namespace osgViewer {
 
@@ -26,6 +28,9 @@ class OSGVIEWER_EXPORT Viewer : public osgViewer::View
     public:
 
         Viewer();
+
+        Viewer(osg::ArgumentParser& arguments);
+
         virtual ~Viewer();
         
         /** Get whether at least of one of this viewers windows are realized.*/
@@ -175,6 +180,8 @@ class OSGVIEWER_EXPORT Viewer : public osgViewer::View
 
     protected:
     
+        void constructorInit();
+    
         void checkWindowStatus();
         
         inline void makeCurrent(osg::GraphicsContext* gc)