To create 'winscpxxxsetup.exe' install package, follow these steps:
1) build 'WinSCP3.exe', 'Console.com' and 'DragExt.dll' (see ..\readme)
2) install 'My Inno Setup Extensions'
   http://www.wintax.nl/isx
   Copyright (c) 2000-2004 Martijn Laan
   Copyright (c) 1998-2004 Jordan Russell (Inno Setup)
3) install 'Putty' package to directory 'c:\program files\putty\'
   http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
   (A Windows-style installer (x86 only) for everything except PuTTYtel)
4) run 'iscc winscpsetup.iss'
4) file 'winscpxxxsetup.exe' is created in directory 'release/files'
