Add support for istemplate parameter where creating db
Fix rspec-system
Add support for installing PL/Perl
Document istemplate parameter
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
Merge pull request #204 from mcanevet/set_istemplate

Add support for istemplate parameter where creating db