Il/order model - added Ordel model and a test

[iris-lux]

Assignment Submission: bEtsy

Congratulations! You're submitting your assignment. Please reflect on the assignment with these questions. These should be answered by all members of your team, not by a single teammate.

Reflection

Prompt	Response
Each team member: what is one thing you were primarily responsible for that you're proud of?
Each team member: what is one thing you were primarily responsible for that you would like targeted feedback on?
How did your team break up the work to be done?
How did your team utilize git to collaborate?
What did your group do to try to keep your code DRY while many people collaborated on it?
What was a technical challenge that you faced as a group?
What was a team/personal challenge that you faced as a group?
What was your application's ERD? (upload this to Google Drive, change the share settings to viewable by everyone with a link, and include a link)
What is your Trello URL?
What is the Heroku URL of your deployed application?