Social media component

db/migrate/20140531130140_add_facebook_url_to_conference.rb

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+class AddFacebookUrlToConference < ActiveRecord::Migration
+  def change
+    add_column :conferences, :facebook_url, :string
+  end
+end

db/migrate/20140531130219_add_google_url_to_conference.rb

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+class AddGoogleUrlToConference < ActiveRecord::Migration
+  def change
+    add_column :conferences, :google_url, :string
+  end
+end

db/migrate/20140531130500_add_twitter_url_to_conference.rb

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+class AddTwitterUrlToConference < ActiveRecord::Migration
+  def change
+    add_column :conferences, :twitter_url, :string
+  end
+end