Add J.R.R. Tolkien legendarium generator

[mathisto]

High Elixir Pals! I'm learning your gee-wiz-neato language and thought I'd port over my ruby-faker generator contribution for all things Tolkien. Should be a pretty exhaustive amalgamation of the books and movies. Most data was scraped from the Tolkien Gateway. I manually cleaned, collated, and deduped. Hope ya'll enjoy having your dev databases filled with clans of Dwarves.

I've added:

• [x] USAGE.md docs if applicable
• [x] CHANGELOG.md
• [x] Four (passing) examples/doctests per method