Fixed unit tests to compile under MSVC.

1. Including config.h in test.
2. Including windows.h before zippy-test.h.
3. Removed definition of WIN32_LEAN_AND_MEAN. This caused problems in
   build environments that define WIN32_LEAN_AND_MEAN as our
   definition didn't check for prior existence. This constant is old
   and no longer needed anyhow.
4. Disable MSVC warning 4722 since ~LogMessageCrash() never returns.

A=cmumford
R=jeff