octave-launch-firsttime: New launcher executable for starting Octave first time. * installer-files/octave-launch.c: Conditionally change to USERPROFILE before running Octave. * binary-dist-rules.mk(octave-launch-firsttime, installer-files/octave-launch-firsttime.exe): Add build rules for new launcher executable. (copy-windows-dist-files): Copy octave-launch-firsttime.exe to $(OCTAVE_DIST_DIR).

## System-wide startup file for Octave.
##
## This file should contain any commands that should be executed each
## time Octave starts for every user at this site.
EXEC_PATH (cstrcat (fullfile (OCTAVE_HOME, 'notepad++'), pathsep, EXEC_PATH));
EXEC_PATH (cstrcat (fullfile (OCTAVE_HOME, 'bin'), pathsep, EXEC_PATH));
EDITOR (fullfile (OCTAVE_HOME, 'notepad++', 'notepad++.exe'));