pinning varia_model in an attempt to fix ruby 1.9.3

Gemfile

@@ -3,6 +3,7 @@ source 'https://rubygems.org'
 gem 'rake', '~> 10.4'
 gem 'berkshelf', '~> 3.2'
 gem 'stove', '~> 3.2'
+gem 'varia_model', '0.4.0'
 
 group :test do
   gem 'foodcritic', '~> 4.0'