Added ImageOptions for use with the GDAL plugin

src/osgDB/ImageOptions.cpp

@@ -0,0 +1,25 @@
+#include <osgDB/ImageOptions>
+
+
+using namespace osgDB;
+
+
+ImageOptions::ImageOptions()
+{
+    init();
+}
+
+ImageOptions::ImageOptions(const std::string& str)
+{
+    init();   
+    _str = str;
+}
+
+
+void ImageOptions::init()
+{
+    _sourceImageSamplingMode = NEAREST;
+    _sourceImageWindowMode = ALL_IMAGE;
+    
+    _destinationImageWindowMode = ALL_IMAGE;
+}