title: What is the difference between _dir and _path and http_ options in Compass Configuration Properties?
body: <p>The description of Configuration Properties of Compass is very vague and ambiguous (<a href="http://compass-style.org/help/documentation/configuration-reference/" rel="nofollow">http://compass-style.org/help/documentation/configuration-reference/</a>). Absolutely not clear and no any additional explanation or examples. Here they are:</p>
  
  <p>What is the difference between these?</p>
  
  <pre><code>css_dir - ...where the css stylesheets are kept
  css_path - ...where css stylesheets are kept
  http_stylesheets_path - ...http path to stylesheets on the web server
  </code></pre>
  
  <p>And these?</p>
  
  <pre><code>sass_dir - ...where the sass stylesheets are kept
  sass_path - ...where sass stylesheets are kept
  </code></pre>
  
  <p>This is extremely not understandable. What do they mean? They are all the same:</p>
  
  <pre><code>images_dir - ...where the images are kept
  images_path - ...where images are kept
  generated_images_dir - ...where generated images are kept
  generated_images_path - ...where generated images are kept
  http_generated_images_path - ...generated images on the web server
  </code></pre>
  
  <p>Same thing here:</p>
  
  <pre><code>fonts_dir - ...where the font files are kept
  fonts_path - ...where font files are kept
  http_fonts_path - ...http path to font files on the web server
  http_fonts_dir - ...http path to font files on the web server
  </code></pre>
  
  <p>How to understand what is the difference from one another?</p>