Add proper Documentation for negative weights in File Sorting.

docs/00_Getting_Started.md

@@ -66,6 +66,8 @@ You must use underscores instead of spaces. Here are some example file names and
 
 To sort your files and folders in a specific way, you can prefix them with a number and underscore, e.g. `/docs/01_Hello_World.md` and `/docs/05_Features.md` This will list *Hello World* before *Features*, overriding the default alpha-numeric sorting. The numbers will be stripped out of the navigation and urls. For the file `6 Ways to Get Rich`, you can use `/docs/_6_Ways_to_Get_Rich.md`
 
+You might also wish to stick certain links to the bottom of a page. You can do so by appending a '-' to the start of the filename, e.g. a new file `/docs/-Contact_Us.md` will always appear at the bottom of the current list. Weights can also be added to further sort the bottom entries. e.g. `/docs/-01_Coming.md` will appear before `/docs/-02_Soon.md` but both will only appear after all positive or non-weighted files. 
+
 ## Landing page
 
 If you want to create a beautiful landing page for your project, simply create a `_index.md` file in the root of the `/docs` folder. This file will then be used to create a landing page. You can also add a tagline and image to this page using the config file like this: