Activate IndexedDB storage.

Simplify storage and tests code.

Change the database structure so that the "attachment" store contains one entry per attachment.

Gruntfile.js

@@ -179,6 +179,7 @@ module.exports = function (grunt) {
           'src/jio.storage/querystorage.js',
           'src/jio.storage/drivetojiomapping.js',
           'src/jio.storage/documentstorage.js',
+          'src/jio.storage/indexeddbstorage.js'
         ],
         dest: 'dist/<%= pkg.name %>-<%= pkg.version %>.js'
 //         dest: 'jio.js'

test/tests.html

@@ -10,6 +10,9 @@
   <script src="../node_modules/grunt-contrib-qunit/test/libs/qunit.js" type="text/javascript"></script>
   <script src="../node_modules/sinon/pkg/sinon.js" type="text/javascript"></script>
 
+  <script>
+    QUnit.config.testTimeout = 5000;
+  </script>
   <!--script src="html5.js"></script-->
   <!--script src="jio/util.js"></script-->
   <!--script src="jio/fakestorage.js"></script>
@@ -33,8 +36,8 @@
   <script src="jio.storage/drivetojiomapping.tests.js"></script>
   <script src="jio.storage/unionstorage.tests.js"></script>
   <script src="jio.storage/erp5storage.tests.js"></script>
+  <script src="jio.storage/indexeddbstorage.tests.js"></script>
 
-  <!--script src="jio.storage/indexeddbstorage.tests.js"></script-->
   <!--script src="jio.storage/indexstorage.tests.js"></script-->
   <!--script src="jio.storage/dropboxstorage.tests.js"></script-->