Change history for GD::Map::Mercator

1.03    2008-Feb-27     D. Arnold
        - fix docs get_image() => image()
        - fix backkground => background typo
        - fix support for #RRGGBB color specs

1.02    2008-Feb-12     D. Arnold
        - fix test suite to use correct skip count

1.01    2008-Jan-24     D. Arnold
        - initial rewrite from GD::Map