Add params and ini_settings for node/report/purge ttls
Document ttl settings in README
Document which versions of PuppetDB the ttl settings work in
Merge pull request #35 from nicklewis/add-ttl-settings

Add params and ini_settings for node/report/purge ttls
Prepare for release 1.2.0

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #44 from kbarber/ticket/master/release

Prepare for release 1.2.0