Added support for "flip" option string, which if present flips incoming images about the vertical axis.  Accessed via -O flip on the commandline.
Added support for "flip" option string, which if present flips incoming
images about the vertical axis.  Accessed via -O flip on the commandline.


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