set locale-related vars to en_US.UTF-8 [fixes rails#47]

Author: fxn

puppet/manifests/default.pp

@@ -149,3 +149,10 @@
   creates => "${home}/.rvm/bin/bundle",
   require => Exec['install_ruby']
 }
+
+# --- Locale -------------------------------------------------------------------
+
+# Needed for docs generation.
+exec { 'update-locale':
+  command => 'update-locale LANG=en_US.UTF-8 LANGUAGE=en_US.UTF-8 LC_ALL=en_US.UTF-8'
+}