- cameo/cameo.c (process_paths): explain the inside/outside path detection
heuristics
- cameo/path.h (struct path), cameo/path.c (path_new): added attribute
"outside" to explicitly mark paths as outside edges
- cameo/path.c (path_from): new function to make a path that takes the
attributes of another path
- cameo/path.c (path_reverse, path_offset): use path_from instead of
path_new
- cameo/gnuplot.c (gnuplot_read, gnuplot_do_write): read and write the
#%outside hint
