Add PixbufNewFromFileAtSize and AtScale, and PixbufGetFileInfo.
Add PixbufNewFromFileAtSize and AtScale, and PixbufGetFileInfo.

andre-hub/gotk3,yamnikov-oleg/gotk3,LittleBuster/gotk3,gotk3/gotk3,pekim/gotk3,yamnikov-oleg/gotk3,gotk3/gotk3,pekim/gotk3,yamnikov-oleg/gotk3,andre-hub/gotk3,andre-hub/gotk3,pekim/gotk3,LittleBuster/gotk3