get_part now returns an array ref in scalar context.
Add parent to the list of dependencies in the makefile.
Add another test for shapes_in_area.

Signed-off-by: Shawn Laffan <shawnlaffan@gmail.com>
->cache: Grab the cache argument at the same time as the rest. This avoids having a shift hidden lower in the code.  It also takes advantage of perl's arg handling optimisations.
Update changes file.

Signed-off-by: Shawn Laffan <shawnlaffan@gmail.com>
A little more neatness - add relevant spaces around operators.

Signed-off-by: Shawn Laffan <shawnlaffan@gmail.com>