transferred Code Ocean from original repository to GitHub

db/migrate/20140625134118_create_exercises.rb

@@ -0,0 +1,11 @@
+class CreateExercises < ActiveRecord::Migration
+  def change
+    create_table :exercises do |t|
+      t.text :description
+      t.belongs_to :execution_environment
+      t.text :template_code
+      t.string :title
+      t.timestamps
+    end
+  end
+end