Add a field for a word's IPA phonetic spelling

Etymology gives away too much info. An alternative is to parse first substring until a colon ':'.

E.g. Late Middle English (in grammatical use): via Old French from Latin masculinus, from masculus 'male'

Word was "masculine". Desired etymology hint would be "Late Middle English (in grammatical use)"

Add the following parameters to the /words GET endpoint.

• locale: either "us" or "uk" (default "us")
• limit: [1, 1000] (default 10 for now)

Blocks #35 and #41 on client

We'll be hard-coding difficulty and categories on the client's database, so there's no need to handle this dynamically with new /categories or /difficulties endpoints.

Create category and difficulty parameters to /words

1. Get word lists for at least 3 categories: standard, and 2 others (e.g. STEM and medical).
2. Figure out how to handle word difficulty. Potential solutions are getting learner's, intermediate, and collegiate word lists, OR implement custom logic to categorize words by some metrics (e.g. word length, English usage)

Include the JSON structure (i.e. fields such as "word", "usage", etc.). This makes sure frontend bros know when format is updated.

See if https://developer.oxforddictionaries.com/ is better than Merriam Webster

Make sure to remove the word from examples