Added a fake search field with an action on submit in the Users template.

Hooked up a controller for Users so that I could use the aforementioned template search field.
- searchTerm: The term to search for.
- title: Displays different content based on whether or not 'searchTerm' contains any content.
- actions.searchForUser: Some fake output for now.

Hooked up a component to see how that works.