Angular uses `save` for new resources. Change this to `update` since it
operates on existing resources.

Highlight the note we're currently editing so we know which one it is.

Add hooks to create new notes and save existing notes from the
interface.

Non-functional. To be used to create a new note.

Lists all notes and populates content section with the body of a note
when one is clicked.

Made as an "x" button to the right of the note load/edit link.

Create & style a save button to save your current note.

Style to have a header, fixed sidebar with links to notes, and lorem
ipsum as a main section.

* Add `main` action to HomeController
* Set `main` as our root route
* Create a view for `main` with dummy text