[img_flip/] flips the image horizontally (x-axis) or vertically (y-axis).
[img_flip output="{format}" axis="{x|y}"]<source>[/img_flip]axis
[img_flip output="img" axis="y"]atest.gif[/img_flip]
<img src="/wp-content/uploads/image-cache/1d2cf16c/atest_gif/flip_y.gif" width="172" height="243" alt="atest.gif" />
[img_flip output="img" axis="x"]atest.gif[/img_flip]
<img src="/wp-content/uploads/image-cache/1d2cf16c/atest_gif/flip_x.gif" width="172" height="243" alt="atest.gif" />