[windows] get the default recipe working on windows
          - admin user is "Administrator", not "root"
          - MSI doesn't create a "sensu" user
          - default tk suite is for the default recipe
[windows] hidden test-kitchen feature suite platform "excludes"
[windows] sensu client working on 2012 r2
[windows] bumped default version of sensu to 0.12.6-4, heartbleed and new msi
Merge pull request #241 from portertech/windows

Improve Windows support