Windows 8 templates

Added 32-bit and 64-bit templates for Windows 8. The ISO for the Windows 8 90 day evaluation will be used.

The templates are based on the Windows 8 Preview template and have been changed to use more memory and the released Windows 8 ISO files.

The templates have been tested with KVM (using [pull request 465](including (https://github.com/jedi4ever/veewee/pull/465)).