Add call for getting all Accounts/Organizations to Api Libraries

[annich-MS]

The Accounts Api is not available in any of the Api Libraries.

This is a big oversight, as it's the first API (after auth) that many services will use.

[danhellem]

Have you tried using the Microsoft.VisualStudio.Services.Account.Client.AccountHttpClient to get what you need?

[annich-MS]

I'm using the node version of the API which only provides the WebApi Object. I'm not sure that class exists there