Add an empty DESTROY method.

Signed-off-by: Shawn Laffan <shawnlaffan@gmail.com>
Add tests for shapefile bounds.
Shapes of type point now store these bounds, as we were getting undef issues since it was not passed on to the Point object.

Signed-off-by: Shawn Laffan <shawnlaffan@gmail.com>
Make the endianness test a package lexical rather than calling it repeatedly.  More a code maintenance change than a speed improvement.

Signed-off-by: Shawn Laffan <shawnlaffan@gmail.com>
Use List::Util min and max when searching for the bounds.

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