Update ereader

Author: mariotsi

src/Analyser/Header/Useragent/Device/Ereader.js

@@ -149,9 +149,15 @@ class Ereader {
         case '630':
           model = 'Sense';
           break;
+        case '631':
+          model = 'Touch HD';
+          break;
         case '640':
           model = 'Aqua';
           break;
+        case '641':
+          model = 'Aqua 2';
+          break;
         case '650':
           model = 'Ultra';
           break;