Updated xmhtml to version 1.1.0

This version has a real master site
and homepage at sourceforge.
Includes updates for buildling with
the latest png api and fixes to
debug.c (patch-ai).
Removed the patches for this.
Removed patch-ab, patch-ac and patch-ae
because we only build the lib.

Other updates upstream:
Support for utf-8 text and xft.
Function XmHTMLScrollToYPos added.
Fixes for crashes and various memory
leaks.

(nros)