README.md in hydra-tutorial-0.0.4 vs README.md in hydra-tutorial-0.0.5

@@ -4,9 +4,14 @@
  * ruby v 1.8.7 or higher
  * java 1.5 or higher (in order to run solr under a java servlet container)
  * [[RVM|https://rvm.beginrescueend.com/rvm/install/]] (recommended)
 
 ```bash
+<INSTALL RUBY, e.g.:
+$ curl -L https://get.rvm.io | bash -s stable --ruby
+$ rvm install 1.9.3
+  (See https://rvm.io/rvm/install/ )
+>
 $ gem install hydra-tutorial
 $ hydra-tutorial
 ```