Added a quickstart section.

Added a quickstart section for people new to Hugo to quickly get to using this theme.

README.md

@@ -11,6 +11,30 @@ By utilizing copious partial templates the theme is largely customizable.
 
 This is a fork of the original [hugo-tufte](https://github.com/shawnohare/hugo-tufte). 
 
+## Quickstart
+
+### Prerequisite: Hugo Extended
+
+You'll need to install Hugo Extended for this theme to test it locally, since this theme uses SCSS.
+- On Windows:
+  - Using [Chocolatey](https://chocolatey.org/):
+    ```powershell
+    choco install hugo-extended # remember, you might need admin privs
+    ```
+
+### For a new site
+
+```powershell
+# this code is shell-agnostic, and should work in cmd, powershell, bash, zsh....
+hugo new site <your-site-name> # create your new site with hugo in your pwd
+cd <your-site-name>\themes\    # cd into the themes directory
+git clone <this-git-repo>      # HTTPS link @ the top of the page if you've never done this before
+```
+
+Add `theme = 'hugo-tufte'` to your `config.toml` to let your site know to actually use _this_ theme, specifically.
+
+Then run `hugo server -D` and open up `localhost:1313/` or wherever it says in Firefox.
+
 ## Features
 
 ### Math