Fix #17: 书签Model的适配器(BookmarkModelAdapter)
Fix #16:显示书签的Activity(DisplayBookmarkActivity)
Fix #18:DisplayAlternativeNovelPagerActivity:显示小说页面的Activity
Fix #20:下载文章的Task
Fix #19:显示文章列表的Activity
Fix #21:下载信息Model
Fix#18: DisplayAlternativeNovelPagerActivity:显示小说页面的Activity
Fix #:DisplayOriginalListActivity 显示文章列表Activity