Windows build

• Start by unpacking the mcstas-1.9-src.tar.gz package using e.g. Winzip.
• Compile the McStas package using the build.bat script of the mcstas-1.9 directory you just unpacked. Follow the on screen instructions.
• When the build has been done (e.g. mcstas.exe has been produced), proceed to install (Section 6).