Windows 7 and 32bit/MBR Support

[mikeslattery]

The Tunic GUI will be rewritten in Python 3 / Gtk3 to resolve severe limitations of Powershell. This will help enable:

• Support for Windows 7, 8, 8.1
• Support for 32 bit MBR systems (but not 32 bit EFI, or 64 bit MBR)
• Much better error handling and more pleasant language in general to work with.
• Better UX. I may take code from Ubiquity (also in Python/Gtk)
• Better testability.
• Future portability to Linux (as a distro-hopper utility) and Mac OSX.

[mikeslattery]

Same design, but looks better.

It was easier to write in Python than PowerShell.