Log Message:
Update to 0.5:

21-MAR-2005   0.5     * Mac OS X version now uses wxWidgets instead of my own \ 
GUI code.
                      * Support for picture files (SVG and EMF).
                      * Some code tidying up.
17-SEP-2003   0.4     * Improved handling of PHYLIP and Clustal
			trees, support for pasting trees from the Clipboard, scroll
                        bar added to help view big trees.