update new plugins I use for dzil

Signed-off-by: Caleb Cushing <xenoterracide@gmail.com>
remove github module

Signed-off-by: Caleb Cushing <xenoterracide@gmail.com>
add a contributing file

Signed-off-by: Caleb Cushing <xenoterracide@gmail.com>
use env perl, and add version to podspell command

Signed-off-by: Caleb Cushing <xenoterracide@gmail.com>