Fix bug 1044, maybe.

Detailed changes:
> 	Fix bug 1044:
> 	* lyskom-buttons.el (lyskom-view-url-windows): Protect execution
> 	of w32-shell-execute from errors (e.g. caused by bad settings).
> 	(lyskom-view-url-windows): Added a bunch of paths to iexplore.exe.
>