MOD: Update bundled copy of stb_image from http://nothings.org/.  For: http://www.cegui.org.uk/mantis/view.php?id=660
MOD: Update bundled copy of stb_image from http://nothings.org/.  For: http://www.cegui.org.uk/mantis/view.php?id=660

RealityFactory/CEGUI,cbeck88/cegui-mirror,arkana-fts/cegui,cbeck88/cegui-mirror,RealityFactory/CEGUI,RealityFactory/CEGUI,cbeck88/cegui-mirror,arkana-fts/cegui,cbeck88/cegui-mirror,RealityFactory/CEGUI,arkana-fts/cegui,arkana-fts/cegui,cbeck88/cegui-mirror,RealityFactory/CEGUI,arkana-fts/cegui