Merge branch 'v1.0' into develop
Version bump; Copyright update
Add AgreementDetails property to Agreement
Update logging to include initial OAuth authentication info
Add webhooks support
Add sample for retrieving billing agreement details
Add webhooks samples
Add payer_id to CreditCard
Add PropertyName attribute to CreditCard.payer_id
Add OAuthTokenCredential ctor that just takes config
Add more OAuthTokenCredential ctor unit tests
Update CHANGELOG.md
Add note about infinite billing plan in sample
Add static methods for all non-static Webhook methods
Update all project files to reference common csproj with source file references
Update look & feel of samples
Remove extra folder from samples
Update README.md for samples
Update README.md
Add Agreement.state property