Adds info about installing jekyll in current dir

Closes #2838

site/_docs/quickstart.md

@@ -16,6 +16,8 @@ For the impatient, here's how to get a boilerplate Jekyll site up and running.
 # => Now browse to http://localhost:4000
 {% endhighlight %}
 
+If you wish to install jekyll into the current directory, you can do so by alternatively running `jekyll new .` instead of a new directory name.
+
 That's nothing, though. The real magic happens when you start creating blog
 posts, using the front matter to control templates and layouts, and taking
 advantage of all the awesome configuration options Jekyll makes available.