Updated scanner to infer when it has reached the end of results.

JSMR.Infrastructure/Http/IHttpService.cs

@@ -2,6 +2,6 @@
 
 public interface IHttpService
 {
-    Task<string> GetStringAsync(string url, CancellationToken cancellationToken);
-    Task<string> GetStringAsync(string url, IDictionary<string, string> headers, CancellationToken cancellationToken);
+    Task<HttpStringResponse> GetAsync(string url, CancellationToken cancellationToken);
+    Task<HttpStringResponse> GetAsync(string url, IDictionary<string, string> headers, CancellationToken cancellationToken);
 }