Add link to home page on the documentation sidebar

[mnlevy1981]

After merging #65 and #62, the sidebar looks like

So if you click on the "Adding New Notebooks" link, there isn't an easy way to return to the homepage.

[rmshkv]

Clicking on the logo does take you back, but I agree that that's not clear - @anissa111 do you know the syntax to set this up?

[mnlevy1981]

Clicking on the logo does take you back, but I agree that that's not clear

Oh, neat -- I didn't realize that was a link. I do think the solution in #67 is a little clearer, but I'm happy either way

[TeaganKing]

I think this was resolved, so I will close the issue.