Merge pull request #47 from elmundio87/windows-feature-resource

Windows Feature resource type
Add octorelease
Bump up version
Merge pull request #48 from elmundio87/windows-feature-caching

Cache results of ListWindowsFeatures for 2 minutes
Bump up version
Merge branch 'master' of https://github.com/serverspec/specinfra into windows-feature-providers