Add Testrun to schema

db/migrate/20160302133540_create_testruns.rb

@@ -0,0 +1,13 @@
+class CreateTestruns < ActiveRecord::Migration
+  def change
+    create_table :testruns do |t|
+      t.boolean :passed
+      t.text :output
+
+      t.belongs_to :file
+      t.belongs_to :submission
+
+      t.timestamps
+    end
+  end
+end