artists/summary: link other names to artist searches.

* Link other names to artist searches instead of to the new artist page.
* Remove the asterisk next to other names indicating the name isn't used
  as the primary name of another artist. This is almost always the case.

app/helpers/artists_helper.rb

@@ -1,17 +0,0 @@
-module ArtistsHelper
-  def link_to_artist(name)
-    artist = Artist.find_by_name(name)
-
-    if artist
-      link_to(artist.name, artist_path(artist))
-    else
-      link_to(name, new_artist_path(artist: {name: name})) + " " + content_tag("span", "*", :class => "new-artist", :title => "No artist with this name currently exists.")
-    end
-  end
-
-  def link_to_artists(names)
-    names.map do |name|
-      link_to_artist(name)
-    end.join(", ").html_safe
-  end
-end