24/03/2017 0.2 - Initial release.
24/03/2017 0.3 - Fix memory leak in XS typemap code.
               - Fix build dependencies and min. Perl version in Makefile.PL
07/08/2017 0.4 - Rewrite to use mixed array/linked-lists for huge reduction in memory
                 usage (at slight speed cost)
               - Fix for FreeBSD test failures
