User wants to choose a recently-played Google Play station

[agriffis]

• [x] mockup of what this should look like @amygriffis
• [ ] make GP station information available in API @agriffis
• [ ] toggle between player view and music view @amygriffis
• [ ] component to display individual station info (image and title) @amygriffis
• [ ] component to display those in a grid @amygriffis

[amygriffis]

1. Clicking the angle-down icon in top left should reveal the station selector display.
2. Clicking song info bar at bottom should return to player display.

[agriffis]

This is blocked by waiting for working Google Play support in API. SoCo/SoCo#433