- Cherry pick 6.0 changes for Visual Studio 2008 support
- Add scripts  win\build-vs9.bat and win\build-vs9_x64.bat

Also, remove CMake generated visual studio project files.

extra/yassl/taocrypt/taocrypt.vcproj:
  remove file that is generated each time by cmake
extra/yassl/yassl.vcproj:
  remove file that is generated each time by cmake
server-tools/instance-manager/mysqlmanager.vcproj:
  remove file that is generated each time by cmake
win/build-vs9.bat:
  Add script for Visual Studio 2008 support
win/build-vs9_x64.bat:
  Add script for Visual Studio 2008 support
zlib/zutil.h:
  support Visual Studio 2008