Add section to README describing Backup & Restore
Add section to README describing Backup & Restore

coffeejunk/CredentialRegistry,learningtapestry/learningregistry,CredentialEngine/CredentialRegistry,coffeejunk/CredentialRegistry,coffeejunk/CredentialRegistry,CredentialEngine/CredentialRegistry,learningtapestry/learningregistry,CredentialEngine/CredentialRegistry,learningtapestry/learningregistry