For all notebooks, display all notes inside a notebook and the contents
and tags of each note.

Rendering the note contents with `html_safe` to get them to display
quickly in a user-readable form because the contents are formatted in
ENML, Evernote's XML markup language.

Tried collecting the notes in the controller but ultimately decided to
output them directly in the view.

List the names of all Evernote notebooks.

We create a new service to make it easier to query the Evernote Ruby SDK
and get all notebooks from it. This code to list notebooks was copied
from the Evernote Ruby SDK's sample EDAMTest.rb file
(https://github.com/evernote/evernote-sdk-ruby/blob/master/sample/client/EDAMTest.rb#L52-L62).

In our controller, we call this service to get our notebooks and pass
those to the view where we display each notebook's name.

Hard-coded the my Evernote Sandbox access token and NoteStore URL
because I didn't save them in the OmniAuth OAuth process. Using these to
query the Evernote API using the SDK.

Note to self: I'll want to deactivate that Evernote Sandbox account
before releasing this.

This will show an example page that gets notebook & note information
from Evernote and displays it.