Solution: Use CMD.EXE environment variable to extract DevStudio version
number and build using it. This even supports machines with multiple
DevStudio versions installed, as long as the build for each version is
done on a separate window with the correct environment.
If multiple version builds are desired from a single CMD.EXE, edit the
buildall.bat file to uncomment the build statements for each specific
version desired.
INSTALL gets added in somewhat magically by automake, or not. Adding it into
Git ensures it's always included in the distribution.
Signed-off-by: Martin Lucina <mato@kotelna.sk>