add base64 require and dependency (#716)

Author: geemus

fog-aws.gemspec

@@ -28,9 +28,10 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rubyzip', '~> 2.3.0'
   spec.add_development_dependency 'shindo',  '~> 0.3'
 
-  spec.add_dependency 'fog-core',  '~> 2.1'
-  spec.add_dependency 'fog-json',  '~> 1.1'
-  spec.add_dependency 'fog-xml',   '~> 0.1'
+  spec.add_dependency 'base64', '~> 0.2.0'
+  spec.add_dependency 'fog-core', '~> 2.1'
+  spec.add_dependency 'fog-json', '~> 1.1'
+  spec.add_dependency 'fog-xml', '~> 0.1'
 
   spec.metadata['changelog_uri'] = spec.homepage + '/blob/master/CHANGELOG.md'
 end

lib/fog/aws.rb

@@ -1,3 +1,4 @@
+require 'base64'
 require 'fog/core'
 require 'fog/xml'
 require 'fog/json'