Log Message:
Update sylpheed-claws (and plugins) to 1.0.4.  This includes the security
fixes from sylpheed 1.0.4.

Other changes:
new Sylpheed-Claws logo by Jesper Schultz

tools/acroread2sylpheed.pl
 script to send pdfs as attachments from Adobe Reader 7
 see tools/README for details

Bug fixes, including the following:
 neglect Reply-To header if empty
 don't load a plugin twice
 don't leave hook registered when spamassassin plugin init failed