Minor fixes

Minor fixes

 - Sidebar doesn't show error if article/jotting doesn't exist in entry_model
   list
 - Lightbox doesn't put border on images.
 - Bash single-line comments now need to start from the beginning

    application/views/sidebar.php
    css/lightbox.css
    sh/scripts/shBrushBash.js
Added jotting '2014_09_watermark'

Added jotting '2014_09_watermark'
    application/models/entry_model.php
    application/views/jottings/2013_08_watermark.php                   (-)
    application/views/jottings/2014_09_watermark.php                   (+)
    images/entries/2014_09_watermark/keyfunc-input.png                 (+)
    images/entries/2014_09_watermark/keyfunc-output-extended.png       (+)
    images/entries/2014_09_watermark/keyfunc-output-overlay.png        (+)
    images/entries/2014_09_watermark/subtlemark-example.png            (+)
    images/entries/2014_09_watermark/thumb-keyfunc-input.png           (+)
    images/entries/2014_09_watermark/thumb-keyfunc-output-extended.png (+)
    images/entries/2014_09_watermark/thumb-keyfunc-output-overlay.png  (+)
    images/entries/2014_09_watermark/thumb-subtlemark-example.png      (+)