adding checkplugin_template_module parameter to call tempaltes from other modules. Useful for roles/profiles setup

Signed-off-by: Nick Chappell <nick@intronic.org>

Merged from PR #34: https://github.com/Icinga/puppet-icinga2/pull/34
updating README

Signed-off-by: Nick Chappell <nick@intronic.org>

Merged from PR #34: https://github.com/Icinga/puppet-icinga2/pull/34