Created a License.md
Created a License.md

MIT license
ProWorksCorporation/Merchello-Purchase-Order-Payment-Provider,qz2rg4/Merchello-Debit-Order-Payment-Provider,ProWorksCorporation/Merchello-Purchase-Order-Payment-Provider,qz2rg4/Merchello-Debit-Order-Payment-Provider,qz2rg4/Merchello-Debit-Order-Payment-Provider,ProWorksCorporation/Merchello-Purchase-Order-Payment-Provider