Added new osgDB::Archive class, and osgarchive example. These are both

very early beginnings so do not function yet.

VisualStudio/VisualStudio.dsw

@@ -459,6 +459,27 @@ Package=<4>
 
 ###############################################################################
 
+Project: "Example osgarchive"=.\examples\osgarchive\osgarchive.dsp - Package Owner=<4>
+
+Package=<5>
+{{{
+}}}
+
+Package=<4>
+{{{
+    Begin Project Dependency
+    Project_Dep_Name Core osg
+    End Project Dependency
+    Begin Project Dependency
+    Project_Dep_Name Core osgDB
+    End Project Dependency
+    Begin Project Dependency
+    Project_Dep_Name Core osgUtil
+    End Project Dependency
+}}}
+
+###############################################################################
+
 Project: "Example osgcopy"=.\examples\osgcopy\osgcopy.dsp - Package Owner=<4>
 
 Package=<5>