sort modules in .prj and .prp files

from Object IO

is saved (for paths in pg_static/static_info}

don't store window positions for windows that have not been opened
in project files

exec path is not specified, by testing whether the
string is empty before calling SetProject, because
SetProject replaces the empty string by the
project path

imporoved error messages so that crashes are recognised as errors;
put macintosh temp files in temp dir;
processor dependant object names;