Updating Rakefile, Gemfile, etc for Spree 1.0 testing compatibilty

spree_digital.gemspec

@@ -12,4 +12,12 @@ Gem::Specification.new do |s|
   s.requirements << 'none'
   s.required_ruby_version = '>= 1.8.7'
   s.add_dependency('spree_core', '~> 1.0.0')
+
+  # test suite
+  s.add_development_dependency 'shoulda-matchers'
+  s.add_development_dependency 'capybara'
+  s.add_development_dependency 'factory_girl'
+  s.add_development_dependency 'ffaker'
+  s.add_development_dependency 'rspec-rails'
+  s.add_development_dependency 'sqlite3'
 end