Feature: Add scrub task

This adds the scrub task which will be used to clean data of sensitive
information when it's pulled down from production.
Feature: Change seed_packet task back to db:seed

We need to use `db:seed` so that we can override the Rails default `db:seed`
task.  This way we can keep our aliases and they will work both for Rails
projects with and without `seed_packet` installed.
Chore: Update gitignore to latest version
Chore: Add Gemfile.lock
Version Bump to 0.0.3