reformatting changes

updated readme file

completely changed README using proper markdown. IMprovements and how to use added

Added task to the readme

attempted to test txt message. Added gem for Webmock. Test still to be complteed

Added Takeaway class. And changed message class to a module

Message module added. tested and sends to my SMS

Added customer class

Order class completed. Calculates total cost. tested

Added method for compiling an order and working out total cost. To be tested

started writing methods fro Order class. Line_item completed

Added 1st test for line-item

Line-item and order files created

Added Menu class

Completed the dish class