[dev] Updated README.md (peach dependency)

dev/README.md

@@ -27,7 +27,7 @@ For the general design discussion, see:
 
 Requirements
 ------------
-Ruby 2.1 (+ HashDiff and Net/SSH for the oar-generator; + ruby-cute for run-g5kchecks)
+Ruby 2.1 (+ HashDiff and Net/SSH for the oar-generator; + peach and ruby-cute for run-g5kchecks)
 
 Example using RVM (https://rvm.io/):
 $ \curl -sSL https://get.rvm.io | bash -s stable --ruby
@@ -35,6 +35,7 @@ $ source ~/.rvm/scripts/rvm
 $ rvm install 2.2
 $ gem install hashdiff
 $ gem install net-ssh
+$ gem install peach
 $ gem install ruby-cute
 
 Input files