Changed the texture search path mechanism to better utlise the OSG's search file path mechansim.
Changed the texture search path mechanism to better utlise the OSG's search file
path mechansim.


XiaoCC/osg,stmh/osg,ghub/osg,omega-hub/osg,XiaoCC/osg,XiaoCC/osg,stmh/osg,omega-hub/osg,koshman86/osg,ghub/osg,ntoand/osg,ntoand/osg,omega-hub/osg,artoolkit/osg,koshman86/osg,artoolkit/osg,stmh/osg,artoolkit/osg,ghub/osg,XiaoCC/osg,artoolkit/osg,stmh/osg,koshman86/osg,XiaoCC/osg,omega-hub/osg,koshman86/osg,ghub/osg,ntoand/osg,ntoand/osg,stmh/osg