Apartment Rental App

Objective: Model functionality for an apartment rental app using JavaScript object constructors, prototypes, and inheritance.

Minimum Requirements

Implement constructors and prototype methods for Person, Manager, Tenant, Apartment, and Unit (see starter code in those files).
Implement prototypal inheritance for the following:
- Manager inherits from Person
- Tenant inherits from Person
Make sure all tests are passing (to run tests, type npm test in your Terminal).

Create a new file src/inherits.js and implement an inherits function:
```
var inherits = function(Child, Parent) {
  Child.prototype = new Parent();
  Child.prototype.constructor = Child;
};

module.exports = inherits;
```
Then require the inherits module in each file that require inheritance, and use the inherits function to DRY up your code.
Write more tests! You'll find some simple tests in the test sub-directory. Once you have all the tests passing, try adding a couple more for edge cases. For example:
- What happens if you try to add a tenant to a unit that's not available?
- What if a tenant tries to move in without any references?

Fork this repo, and clone it into your develop folder on your local machine.
Change directories into apartment-oop, and run npm install in your Terminal. This installs the testing modules (mocha and chai) locally into your project repo.
Instructions for implementing each module are in their respective files, so poke around in person.js, manager.js, tenant.js, apartment.js, and unit.js. Read the comments to guide your implementation.

The main.js file is set up to allow you to test your models in the node REPL.

Open the node REPL and require('./src/main.js'):

➜  node
> var app = require('./src/main.js');

Create a new instance of Person:

> var Person = app.Person;
> var john = new Person('John Doe', '123-456-7890');
> john.contact
'123-456-7890'

As you make code changes, frequently commit and push to GitHub.
Once you've finished the assignment and pushed your work to GitHub, make a pull request from your fork to the original repo.