Documentation on how to use/edit masonstrap added

- thanks @slackbot and @zmknox for reminding me to type this out

masonstrap/README.md

+# Masonstrap (GMU bootstrap theme)
+
+A project of [GMU SRCT](http://srct.gmu.edu).
+
+Masonstrap is a custom theme for bootstrap customized with GMU brand colors and elements.
+It aims to easily provide any web project with Mason branding.
+
+## Enabling Masonstrap for Your Project
+<legend></legend>
+
+All you need to do is to take _bootstrap.min.css_ and add it to the static files for your project.
+
+Masonstrap bundles bootstrap 3.0 and normalize.css for you.
+
+
+## Making Changes to Masonstrap
+<legend></legend>
+
+If you would like to make changes to values or behaviors in Masonstrap you will need to do some quick setup.
+
+Ensure node.js is installed:
+
+`$ sudo apt-get install npm`
+
+and in the root directory of this project (bootswatch/) run:
+
+`$ npm install`
+
+You will also need to have Grunt installed globally on your system:
+
+`$ npm install -g grunt-cli`
+
+Finally, run:
+
+`$ grunt watch`
+
+in order for Grunt to rebuild the bootstrap files.
+
+After that, you are free to make whatever changes you like to _variables.less_ and _bootswatch.less_ and _bootstrap.min.css_ will be updated accordingly.