Add more windows series

* Add windows 7, 8 and 8.1 to supported series
* get windows product name from registry instead of powershell commandlet
API server is now dual stack capable, listening on both
IPv4 and IPv6 endpoints.
Merge pull request #224 from dimitern/apiserver-listens-dualstack

state/apiserver: Ensure we always listen to IPv4+IPv6

API server is now dual stack (IPv4+IPv6) capable, as it
listens on both 127.0.0.1 and ::1, and clients can connect
to it using both protocols. Added tests and some internal
details needed tweaking. Live tested on EC2.
Merge pull request #179 from gabriel-samfira/add-more-windows-series

Add more windows series

* Add windows 7, 8 and 8.1 to supported series
* get windows product name from registry
fix NetworkInterface.SetDisabled
Merge pull request #237 from klyachin/125-setdisabled

Fix NetworkInterface.SetDisabled

I have fixed NetworkInterface.SetDisabled(flag) method to modify doc immediately as the disable state has been changed.