[Image-SIG] Converting images to palette mode

[Lukáš Oršin]

Thanks for syntax advices ;)
The version with del(image) clause seems to be more successful.
Unfortunately it can´t still run to the end.
Program crashed at 37 % of processing with 98 MB allocated memory.
I am using PIL in 1.1.6 version.
Unfortunately we have not the opportunity to test that batch in Linux,
just in Windows.

PS:
I am posting from another e-mail (luko.pn at gmail.com). Posting from my
main address (lukas.orsin at infinit.sk), powered by Google Apps for
Business, still returns the notification about suspicious header. The
same to my colleague @infinit.sk. Could the admin chech it please ?