Add Flip and Mirror Functions to Palimg

[kunzite1]

Title
Add Flip and Mirror Functions to Palimg

Short, concise description of the idea
Create two new parameters to the palimg software that perform "flips" and "mirrors."

Full description of the idea

An ordered list of benefits

• You won't need two copies of an image just to have one being a different direction.

An ordered list of problems/issues involved

• May increase server load/CPU time.

An organized list, or a few short paragraphs detailing suggestions for implementation

• Copy the "Flip Vertical" and "Flip Horizontal" logic from the Manage Picture page in ScrapBook to the URL handling code.