Scaffold CodeHarbourLink with field oauth2token

(leoselig/codeocean#2)

db/migrate/20160204094409_create_code_harbor_links.rb

@@ -0,0 +1,9 @@
+class CreateCodeHarborLinks < ActiveRecord::Migration
+  def change
+    create_table :code_harbor_links do |t|
+      t.string :oauth2token
+
+      t.timestamps
+    end
+  end
+end