Changes

* HTML5 App Cache: [https://bugzilla.mozilla.org/show_bug.cgi?id=683794 We do not fire the onupdateready event] - needs investigation & a test

* [https://bugzilla.mozilla.org/show_bug.cgi?id=625071 IndexedDB: Can't delete a database] - do this with Set Version

* IndexedDB: [https://bugzilla.mozilla.org/show_bug.cgi?id=661877 Enable storing files] See also: [Features/Platform/LargeFilesForIndexedDB feature page for this bug] - Jan is working on this