README.md: List AzureAPI.packaged-product
README.md: List AzureAPI.packaged-product

This doc update should have been part of ac2181f (azure-providers.js:
Add PackagedProduct and update associated APIs, 2015-11-23) which was
released with 0.3.0.

azurestandard/azure-angular-providers,azurestandard/azure-angular-providers