relax SVN archive

The linewidth for all graph elements can now be set in write_xy_header().

The symbol fill style can now be specified in write_xy_header().

The graph view port size can now be changes and defaults to a larger value.

The grace version of the write_xy_header() header is not output.

The 'Spin ' text is now prepended to the legend only in get_data(), and not write_xy_header().

Fix for write_xy_header(), axis limits are now set when the value is 0.

The graph title and subtitle can be specified in write_xy_header().

Fix for the colour setting in write_xy_header().

The arg is called set_colours, not colours!

Much finer control of the set appearance in write_xy_header().

The symbol style, sizes, and line linestyle can now all be specified.

The symbols are now also coloured in write_xy_header().