Merge branch 'release/0.5.0' into develop
Added api for address validation #5256
Merge pull request #13 from tarunbhardwaj/address_validation_5256

Added api for address validation #5256
Handle special case for shipment from US to PR or CA
Merge pull request #14 from tarunbhardwaj/invoice_line

Handle special case for shipment from US to PR or CA
Release version 0.5.1
Merge branch 'release/0.5.1'