[ptx] autopano-sift 2.1 released: bugfixes and integration

[Pablo d'Angelo]

Hi Sebastian,

> I am pleased to announce a new version of autopano-sift has just been
> released, version 2.1.

Whow that was a fast week :)

>   + Add command line parameters to the GUI to be invoked from third party
>     programs for easier integration with them:
>       a) --output <filepath>, preset the PTO output file

Hmm, ok, I'll change the default arguments to support this.

>       b) --absolute, use absolute pathnames in the PTO output file

Hmm, currently I'm just looking at the file name without path when parsing
the autopano output anyway.

That breaks if images with the same name in different directories are
used. I'm not shure if that is a real problem.

>       c) --imagelist <list.txt>, read input images from textfile

Ok, thats a good thing to have, will add support for that as well.

>       d) image filenames can also be read from command line

Should be all the really needed things. Setting the number of control
points per pair might also be nice, but its not absolutely required.

ciao
  Pablo