Replaced dependency on aws-sdk with aws-sdk-v1.

This allows a user to still use version 2 of the aws-sdk gem in the same application.

Author: trevorrowe

aws-sessionstore-dynamodb.gemspec

@@ -13,6 +13,6 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_dependency 'aws-sdk', '~> 1.0'
+  spec.add_dependency 'aws-sdk-v1'
   spec.add_dependency 'rack', '~> 1.0'
 end