Initial Release Ready for testing

[cybersai]

Added

• Ussd Package Project with README, contributing, changelog, license, etc.
• State class to define what should occur at various stages when user navigates
• Artisan command to create State classes
• Machine class to run all linked States
• HasManipulators traits to help Machine Class with common functions
• Menu class to be used create user menus in the various states
• Decision class to decide on how to link the various states after accepting user's input
• Record class to save data
• Ussd Class to provide access other classes
• Ussd facade to proxy to the Ussd class
• Ussd config to allow developers customize behaviour
• Ussd service Provider class to allow laravel know how to integrate the package