[8u40] Review request for RT-38230: Document the image file formats supported by javafx.scene.image.Image

[Vadim Pakhnushev]

Hi Jim,

Please review the fix:
https://javafx-jira.kenai.com/browse/RT-38230
http://cr.openjdk.java.net/~vadim/RT-38230/webrev.00/

Thanks,
Vadim