Windows bat files should explicitly set paths

[newville]

Hi Bruce,

Sorry that I'm not grokking the perl well enough to issue a pull request, but I think you want to change win/inno/modify_path.pl to end up with

@Rem = '---Perl---
@echo off
SET PATH=C:strawberry\perl\bin;C:\strawberry\c\bin;C:\strawberry\perl\site\bin;%PATH%
C:\strawberry\perl\bin\perl.exe -x -S "%0" %1 %2 %3 %4 %5 %6 %7 %8 %9 > "%APPDATA%\demeter\dartemis.log" 2>&1
goto endofperl

etc, with the paths calculated from your
my $app = $ARGV[0] || 'C:\strawberry';
my $target = catfile($app, 'perl', 'site', 'bin');
my $perlexe = catfile($app, 'perl', 'bin', 'perl.exe');

I think if you do this, then you could consider changing the installer to not explicitly put C:\strawberry.... into the system path. For folks who want this in their path, you could include a simple bat file that simply appended the path SET PATH=%PATH%;C:\strawberry\perl....