Read all pages of a package's results. Fixes praeclarum#95

When the NuGet API returns package versions as part of the response, the
code only read the versions from the last page. It now reads the
versions from all pages, whether they're returned inline or referenced
via a secondary URL.

Data/PackageVersions.cs

@@ -97,19 +97,16 @@ private static async Task ReadVersionsFromUrl (HttpClient httpClient, PackageVer
                 // Console.WriteLine(rootJson + "\n\n\n\n");
                 var root = JObject.Parse (rootJson);
                 var pages = (JArray)root["items"];
-                if (pages.Count > 0) {
-                    var lastPage = pages.Last ();
-                    var lastPageItems = lastPage["items"] as JArray;
-                    if (lastPageItems != null) {
-                        package.Read (lastPageItems);
+                foreach (var p in pages) {
+                    var pageItems = p["items"] as JArray;
+                    if (pageItems != null) {
+                        package.Read (pageItems);
                     }
                     else {
-                        foreach (var p in pages.Reverse ()) {
-                            var pageUrl = p["@id"].ToString ();
-                            var pageRootJson = await httpClient.GetStringAsync (pageUrl).ConfigureAwait (false);
-                            var pageRoot = JObject.Parse (pageRootJson);
-                            package.Read ((JArray)pageRoot["items"]);
-                        }
+                        var pageUrl = p["@id"].ToString ();
+                        var pageRootJson = await httpClient.GetStringAsync (pageUrl).ConfigureAwait (false);
+                        var pageRoot = JObject.Parse (pageRootJson);
+                        package.Read ((JArray)pageRoot["items"]);
                     }
                 }
             }