Added a "link" color to src\templates\opac\parts\css\colors.tt2 matched
to the default dark green of the css_colors.primary, and set
the anchor color in templates\opac\css\style.css.tt2 on line 37 to use
css_colors.link.
Signed-off-by: Sam Link <slink@LIBPC002> Signed-off-by: Rogan Hamby <rogan.hamby@gmail.com> Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>