dia.exe and dia-win.exe

[Steffen Macke <sdteffen gmail com>]

Hello All,

I would like to ship two flavours of dia with the
next Windows installer:

* dia.exe which is linked with /subsystem:console, allowing to
use see commandline output and error messages

* dia-win.exe which should be used by default, linked with /subsystem:windows
  This is available from the Start Menu, Desktop and Explorer double-click

What do you think about this? Remember the many complaints of people
about the "DOS" Window that confused them.

Hans: Is it ok with you to change app/makefile.msc to build both
dia.exe and dia-win.exe?

Regards,

Steffen