Merge pull request #1 from tansaku/master

getting orders sorted
created a menu_reference method to be used by the order class and changed menu_items to array
edited order class to make the order list a hash and made it possible to calculate cost
found that hashes can not have keys repeated. turned order list to array, created method to display order
created order header and footer(untested)
added Twilio sms capabilities but it does not work yet
sorting sms