Add show actions for note, artist, artist commentary versions.

Add these endpoints:

* /note_versions/1234
* /artist_versions/1234
* /artist_commentary_versions/1234

This is so the /ip_addresses listing can link to these endpoints.

app/controllers/artist_versions_controller.rb

@@ -6,4 +6,10 @@ class ArtistVersionsController < ApplicationController
     respond_with(@artist_versions)
   end
 
+  def show
+    @artist_version = ArtistVersion.find(params[:id])
+    respond_with(@artist_version) do |format|
+      format.html { redirect_to artist_versions_path(search: { artist_id: @artist_version.artist_id }) }
+    end
+  end
 end