Mention gem in README

README.md

@@ -18,12 +18,29 @@ This Jekyll theme was crafted with <3 by [John Otander](http://johnotander.com)
 If you're completely new to Jekyll, I recommend checking out the documentation at <http://jekyllrb.com> or there's a tutorial by [Smashing Magazine](http://www.smashingmagazine.com/2014/08/01/build-blog-jekyll-github-pages/).
 
 ```
-$ git clone [email protected]:johnotander/pixyll.git
+$ git clone -o upstream [email protected]:johnotander/pixyll.git
 $ cd pixyll
 $ gem install bundler # If you don't have bundler installed
 $ bundle install
 ```
 
+Alternatively, if want to install the theme as a Gem, you can add this
+line to your Gemfile:
+
+```ruby
+gem "pixyll"
+```
+
+Then, add this line to your Jekyll site:
+
+```yaml
+theme: pixyll
+```
+
+And then execute:
+
+    $ bundle install
+
 #### Verify your Jekyll version
 
 It's important to also check your version of Jekyll since this project uses Native Sass which
@@ -33,6 +50,13 @@ is [only supported by 2.0+](http://jekyllrb.com/news/2014/05/06/jekyll-turns-2-0
 
 Fork the repo, and then clone it so you've got the code locally.
 
+If `git remote -v` doesn't have your fork listed, you can do the following to add it:
+
+```
+git remote add origin [email protected]:USER/pixyll.git
+```
+
+Where `USER` above is your GitHub user name.
 
 ### Modify the `_config.yml`
 
@@ -68,6 +92,13 @@ Now you can navigate to `localhost:4000` in your browser to see the site.
 
 You can host your Jekyll site for free with Github Pages. [Click here](https://pages.github.com/) for more information.
 
+If you are using the gem (see above), then you need to add the the
+github-pages gem to your Gemfile:
+
+```ruby
+gem 'github-pages'
+```
+
 #### A configuration tweak if you're using a gh-pages sub-folder
 
 In addition to your github-username.github.io repo that maps to the root url, you can serve up sites by using a gh-pages branch for other repos so they're available at github-username.github.io/repo-name.