Support Required User Agent Header Format

AfterPay now require a user-agent header in the format Vendor/Product/Version/MerchantID: MerchantId
The system has been updated with properties on the configuration class for vendor and merchant id, and to build the required format header value.

Updated to Latest Dependencies

1.0.3

Update bat file for release.

Fix Default User-Agent Header

1.0.2

update nuget publish cmd for new version.

Initial release.

1.0.0

Merge branch 'master' of https://github.com/Yortw/Yort.AfterPay.InStore