Visible labels (coorasse#25)

* Default labels to visible

* comments

Author: annaswims

lib/passkit/base_pass.rb

@@ -48,15 +48,18 @@ def web_service_url
     end
 
     def foreground_color
+      # black
       "rgb(0, 0, 0)"
     end
 
     def background_color
+      # white
       "rgb(255, 255, 255)"
     end
 
     def label_color
-      "rgb(255, 255, 255)"
+      # black
+      "rgb(0, 0, 0)"
     end
 
     def organization_name