Fixed crashes, added W3DHUB_DEBUG constant, reduced size of Excon download buffer from 4 MB to ~50KB to make ui able to more accurately show download activity

lib/states/interface.rb

@@ -158,6 +158,10 @@ class W3DHub
         @page.focus
       end
 
+      def current_page
+        @page
+      end
+
       def update_server_browser(server)
         return unless @page.is_a?(Pages::ServerBrowser)