Steven Leighton's engineering exercise

[stevecl5]

@thawk55 @jakerichan
This branch contains my completed engineering exercise for Divvy.

Completed objectives:

• Write filtering options for transactions, users, and/or merchants
• Write a new schema, queries, and mutations to add companies to the app
• Seed the database

Note: The support folder contains supporting materials that I used to complete the exercise which may be of interest. It also contains a write-up summarizing my approach and completed work.