Remove JSHint warnings

Part of the ember server's job is running JSHint on all of the files as we
develop.  I had made some variables that we'll need eventually but that aren't
usable yet, due to the mocked out sign-up process, and JSHint was complaining
about it.  No more complains!
Fix more JSHint noisy-ness
Pass basic existence tests

When files are created with the Ember CLI, tests are automatically generated to make sure that all of the objects exist.  However, not all of them were passing because of some silly things I did earlier with moving and renaming files without also changing the correspondings tests.

To get around this in the future, always use "ember g" and "ember d" for creation and destruction, respectively, as they will also make or remove the tests for that file.

This commit also renames the Memo and Contact models, since I realized that I had named them plurally, but they really should be singular.
Add tests for current session service
Add test for header component
Add blueprint for integration tests

Integration tests are awesome (and super necessary) but there's a bunch of boilterplate involved in generating them properly.  To aid in the creation of separate integration tests for each view of the app, I created a blueprint that `ember generate` can use to great new integration tests.

## API

```
ember generate integration-test sign-up
```

Creates an integration tests for "SignUp" that automatically fails, so you know that it worked ;)

Yay for reducing boilerplate!
Added integration tests for the homepage
Add integration tests for login and sign up
Added memo detail integration tests
Follow naming convention for tests
Don't run Chrome in testing by default

You can still connect on http://localhost:7357 to test in other browsers
Remove uneccesary memo detail test
Add integration test for adding a new memo

The test is currently disabled. See comment for reasoning. At the moment, there's no real solution to the problem we're facing.
Add unit tests for Memos/Memo Page

Specifically test deleting a memo
Added unit test for memo adding
Add unit tests for adding contact controller
Add unit test for login
Add unit tests for sign up page
Add unit test for add task route
Remove unneeded tests