Native Windows Support

Nyx can probably run in Cygwin, but native Windows support requires...

• Curses alternative. Python has a ticket for adding Windows support but looks unlikely to get traction. Forerunner seems to be PDCurses.

• Resource usage information. Stem already supports Windows connection resolution but we need to expand Nyx's tracker to retrieve cpu/memory usage on Windows too.

Maybe some other gotchas too. Windows is adding a *nyx commandline which might be interesting to keep an eye on.