Correction for downloaded data folder

if you downloaded content from example.org/*, it would be listed in a folder titled * instead of the sitename. See #6 (and thanks to elidickinson for pointing it out!)

lib/wayback_machine_downloader.rb

@@ -154,10 +154,12 @@ class WaybackMachineDownloader
   end
 
   def backup_name
-    if @base_url.include? '//'
+    url_to_process = @base_url.end_with?('/*') ? @base_url.chomp('/*') : @base_url
-      @base_url.split('/')[2]
+    
+    if url_to_process.include? '//'
+      url_to_process.split('/')[2]
     else
-      @base_url
+      url_to_process
     end
   end