call gui_set_need_restore when turning lcd on, fixes issues with gui not showing correctly on some cameras - from lapser in http://chdk.setepontos.com/index.php?topic=10551.msg108459#msg108459
remove unneeded and confusing CAM_HAS_VARIABLE_ASPECT define from cameras which also define CAM_USES_ASPECT_CORRECTION, see http://chdk.setepontos.com/index.php?topic=11070.msg108474#msg108474
add PROPCASE_AF_LOCK for propset 3, from waterwingz in http://chdk.setepontos.com/index.php?topic=650.msg108483#msg108483
add PROPCASE_CONTINUOUS_AF and PROPCASE_SERVO_AF for propset 3, from waterwingz in http://chdk.setepontos.com/index.php?topic=650.msg108487#msg108487