update gems; fix timeout errors

app/models/feed.rb

@@ -36,14 +36,13 @@ class Feed < ActiveRecord::Base
   # delete feeds in batches
   def self.delete_in_batches(channel_id)
     channel = Channel.find(channel_id)
-    connection = ActiveRecord::Base.connection
 
     # while there are still feeds left
     while channel.feeds.count > 0
       # create the sql query to delete 1000 feeds from the channel
       sql = "DELETE FROM feeds WHERE channel_id=#{channel_id} LIMIT 1000"
       # execute the sql query
-      connection.execute(sql)
+      ActiveRecord::Base.connection.execute(sql)
       # wait a bit before the next delete
       sleep 0.1
     end