Add puppetdb-anonymize tool

This patch adds a new tool 'puppetdb-anonymize' which provides users with a
way to anonymize/scrub their puppetdb export files so they can be shared
with third parties.

Signed-off-by: Ken Barber <ken@bob.sh>
Correct minor code review items

Signed-off-by: Ken Barber <ken@bob.sh>
Add --config parameter to accept a clojure formatted custom profile file

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #558 from kbarber/anonymized_exports_config

Add puppetdb-anonymize tool