Most of CanJS should be running in strict mode. Exceptions are modules like can-assign where the behavior would change.

To turn on strict mode:

"use strict";

// other js

Steps:

1. Learn how to make code-mods from kevin. code-mod should not re-add strict mode.
2. Use greenkeeper to make PRs
3. How to decide which files the code-mod should run on. Should it run on tests? (Maybe not b/c we could have canjs/canjs run tests in strict if we wanted).