Link to artist entries for taken artist names.

In artist entries, there is a Check link next to the name field that
lets you check whether the name is already taken. When the name /is/
taken, you often want to check the other artist entries to see if
you're creating a duplicate. This adds links to the other entries so you
can check them more easily.

app/assets/stylesheets/specific/artists.css.scss

@@ -29,6 +29,10 @@ div#c-artists, div#excerpt {
     .hint {
       display: block;
     } 
+
+    #check-name-result a {
+      margin-right: 1em;
+    }
   }
 
   div.recent-posts {