In Feed#ping_hubs, rescue a network error and simply log it instead o…

…f crashing

This won't alert users if pinging the hub has failed; but there's not much they could do about it anyway. Another motivation for this change is developing offline; before this change, updating your profile would crash the whole app if the hubs couldn't be reached.

app/models/feed.rb

@@ -124,6 +124,8 @@ def populate_entries(os_entries)
   def ping_hubs
     feed_url = url(:format => :atom)
     OPub::Publisher.new(feed_url, hubs).ping_hubs
+  rescue SocketError => e
+    logger.error "Feed#ping_hubs error: could not reach hubs; check the network connection."
   end
 
   def local?