Updated the handling of string in the .osg reading and writing so that it

handles the use of " quotes inside the string.

include/osgDB/Output

@@ -34,6 +34,9 @@ class OSGDB_EXPORT Output : public std::ofstream
 
         Output& indent();
 
+    	/** wrap a string with "" quotes and use \" for any internal quotes.*/
+    	std::string wrapString(const std::string& str);
+
         inline void setIndentStep(int step) { _indentStep = step; }
         inline int getIndentStep() const { return _indentStep; }