Merge pull request #363 from katyhuff/readme-install

adds instructions so folks can build the website

Author: katyhuff

README.md

@@ -6,4 +6,26 @@ Fuel Cycles group.
 
 ## Building This Website
 
-Coming soon... 
+It should be sufficient to do the following:
+
+Clone the repo:
+`git clone git@github.com:arfc/arfc.github.io`
+
+Make your way to the top level of the source branch:
+`cd arfc.github.io && git checkout source`
+
+Install the gems:
+`bundle install`
+
+Build and serve the site locally:
+`bundle exec jekyll serve`
+
+The terminal will report that your website is being served at localhost:4000. 
+Navigate your browser there and you should see the webpage.
+
+## Advanced build and push
+Do everything in the previous section. If everything looks ok on preview, 
+execute:
+`rake publish`
+
+The built site will be committed to master and force pushed up to the website.