#1 Executable/script naming conflict

Under Cygwin on Windows systems, the Gpx2Map.exe (Janel
Java launcher) and gpx2map shell script are
indistinguishable. Running

$ bin/gpx2map

causes the Janel launcher to be executed, which doesn't
work from the development environment.

Workaround is explicitly called out /bin/sh:

$ sh bin/gpx2map

which is a pain. Best way to fix this is to create a
separate directory for win32 launchers and their
configs and modify the Ant dist target to match.