docs: Added alternate gemfile info

Author: joshgerdes

.gitignore

@@ -1,6 +1,8 @@
 _site
 .sass-cache
+.jekyll-cache
 .jekyll-metadata
 *.sublime-project
 *.sublime-workspace
-.DS_Store
+.DS_Store
+Gemfile.lock

README.md

@@ -29,6 +29,15 @@ Jekyll-Uno - a minimal, responsive theme for Jekyll based on the [Uno](https://g
 
 Access via: [http://localhost:4000/jekyll-uno/](http://localhost:4000/jekyll-uno/)
 
+If you would like to run without using the `github-pages` gem, update your Gemfile to the following:
+
+```
+source 'https://rubygems.org'
+gem 'jekyll-paginate'
+gem 'jekyll-watch'
+gem 'kramdown'
+gem 'kramdown-parser-gfm'
+```
 ---
 
 ### Demo and Download