Consolidate Home and Listen screens

[adrmac]

As a new user, I want to go from the 'Listen Live' call to action to playing a live stream in as few clicks as possible, so I can quickly understand what Orcasound is and does.

Current user flow:

1. Listen Live
2. Home: Select a hydrophone
3. Listen: Select a hydrophone
4. Hydrophone auto-starts after selection

The goal of this issue is to remove step 2, while retaining a link somewhere to the 'Learn' screen.

How do we know if we are successful in resolving this?
We should see the number of player starts rise as a % of site visits.