- cameo/path.h, cameo/path.c (path_replace): replace a path in a list of
paths with a different path
- cameo/path.h, cameo/path.c (path_find_leftmost): find the leftmost path
in a list of paths
- cameo/path.h, cameo/path.c (path_free): move freeing of points to separate
function free_points, for sharing with path_replace
- cameo/cameo.c (main): move path processing to new function process_paths
- cameo/cameo.c (process_paths): treat the leftmost path a outside path and
process it last. Treat all others as inside paths.
- cameo/path.h, cameo/path.c (offset_point, path_offset): added "left"
argument to indicate the handedness
- cameo/path.h, cameo/path.c (path_tool_is_left): new function to determine
which way the path turns
- cameo/cameo.c: auto-detect handedness and instruct path_offset accordingly
