cross compatibility with Windows environments

Gemfile

@@ -22,7 +22,7 @@ gem 'turbolinks'
 gem 'jbuilder', '~> 2.0'
 # bundle exec rake doc:rails generates the API under doc/api.
 gem 'sdoc', '~> 0.4.0', group: :doc
-
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw]
 # Use ActiveModel has_secure_password
 # gem 'bcrypt', '~> 3.1.7'