* Got screen resizing to work.
* Created function activeContextMenu() in js/mobile.js. If webpage is displaying a feed, then cycle through the articles and add custom context menus. If an un-read article, then context menu will include "Mark above as Read" and "Mark as Read". If a read article, then context menu will include "Mark as Unread". If webpage is displaying an article and contains images with title attributes, then cycle through them and add custom context menus that include "View Image Title" and "Open Image in new Tab".