[ptx] autopano settings

[David Grant]

Just curious what others do:

1) How many control points to you try to create per image? I'm been trying to 
use unlimited, but I'm not sure if that makes things better or worse.

2) Do you do "automatic alignment of images"? Do you tell it to create any 
horizontal control lines?

3) What input size do you use? I've been using 1300 these days, ever since I 
upgraded to 1Gig of RAM.

4) Do you use the refinement step?

5) Do you keep unrefinable points? I usually don't.

I've just guessed at these settings...I don't really know what I'm doing...

Dave