update ppport
update copyright dates; made rt links canonical; added link to repository
move author tests into separate directory
add perlcritic author test
add a gitignore file
update author tests
use current idioms
strip ppport
fix for perl 5.19.4

arrays were changed to no longer use &PL_sv_undef to represent unused
slots.
resizing a grid is now destructive

this fixes a memory leak when a grid was resized smaller. the previous
behavior was undocumented, so users should not have relied upon it.
ignore MYMETA.* files
upgrade ppport
don't need DynaLoader fallback, XSLoader has been in core since 5.6.0
update copyright dates
bump version for new release