Plugin support

What's Changed

• Add support for a --exclude option by @jkeuhlen in #18
• Create a new flag to --exclude-columns from ripoff-export by @jkeuhlen in #22
• Add support for plugins by @mortenson in #23
• Generate ripoff queries asynchronously to help plugin performance by @mortenson in #27

New Contributors

• @jkeuhlen made their first contribution in #18

Full Changelog: v0.0.1...v0.0.2