[framework] Metasploit on Windows

[Tim]

> My vote : we don't need a Cygwin bundle with Metasploit, but ensuring
> compatibility with Cygwin is still useful for many people out there.

I'm not a fan of Windows or Cygwin, but if supporting that platform
means more security awareness and use of metasploit as a standard
framework, then by all means keep it around.

I don't know if anyone has explored the option of cross-compiling the
relevant libraries with MinGW.  I've got it to work on a few packages,
with relatively little pain, but other packages are very painful.  Just
depends on how the code is written.  Perhaps it would make packaging
binaries easier...?  

tim