gistfile1.cs

void Main()
{
	var x = XDocument.Load(@"...\packages.config")
		.Document.Root.Elements().Select (r => r.Attribute("id").Value)
		.Select (r => {
			var cq = CsQuery.CQ.CreateFromUrl("https://www.nuget.org/packages/" + r);
			return new{ 
				Package = r,
				License = cq[".licenseName"].Html(),
				LicenseUrl = cq["a"].Single (el => el.InnerText == "License")["href"]
			};
		})
		.Dump();
}

Oops, forgot the version numbers. An exercise for the reader...