Integrate TweakPNGCL-type command-line options

[TPS]

@jsummers TweakPNG CL is defunct, but its concept is potentially useful. Could it be integrated into baseline TweakPNG?

I'm attaching last available version from above Wayback Machine link.

[jsummers]

Sorry, but I just don't have any plans to do that. Reasons include my lack of enthusiasm, the fact that it's not clear how much of TweakPNG's code would be useful, the can of worms that it opens (no matter how many features it has, everyone will need one more), and the fact that it would have to be a separate application (whether a Windows .exe file is GUI vs. command-line is set in stone at compile time).

[IceReaper]

:( Damn, i was hoping on a way to call TweakPNG via cli to add new tEXt chunks with given key / value without the need for my custom app to append a chunk and also properly calculate the crc. We are using png on OpenRA with embedded tEXt metadata for spritesheet metadata (like frame size, frame offset, ...). And being able to do this via cli would come handy for a whole blender -> game ready png sheet toolchain.

[TPS]

@IceReaper Maybe try the defunct version from my OP?

[IceReaper]

I tested it out, but besides an old gui i was not able to get any list of available cli command to show up :(