Added file search path to ESRI reader.
Added file search path to ESRI reader.


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