add QR/Barcode scan

app/assets/javascripts/foodcourt.js

@@ -15,6 +15,7 @@
 //= require BSBMaterial/turbolink_admin.js
 //= require BSBMaterial/demo.js
 //= require custom.js
+//= require onscan.js
 
 /* Constant Varaibles */
 _CREDIT_PAYMENTS_ = "/   CREDIT PAYMENTS";