[ptx] panoramic pictures color adjustments

[Philippe Thomin]

Hello everybody,

I'm happy to see the awaken of color correction in many projects. The 
silence about this was my main motivation for writting the small 
program that i have send to Pablo.

It's not intended to be a tool for non-computer-aware people, but I use 
it as a small testbed for testing ideas. As I previously said to Pablo, 
I will try to compute many-image-corrections in one exec (maybe 
following Daniel M German lineguide algorithm.

As a programmer, I prefer modular approaches. I think that making small 
utilities is more flexible. Maybe making competing programs, but 
aggreeing on a minimal common command-line syntax could be a good 
point ?

See you in one week or two, because its exam time in my university, and 
i have a lot of urgent work
Philippe Thomin