Add support for installing PL/Perl
Add missing manifests/plperl.pp file
Use $::operatingsystemrelease instead of $::lsbmajdistrelease
Set plperl_package_name to postgresql-plperl on every RedHat family OS except RHEL5
Test plperl only on non standard installation as it does not work on redhat5
Merge pull request #205 from mcanevet/plperl

Add support for installing PL/Perl