Create a new layout for episode detail pages
Reuse main layout in the episode layout
Episode detail: Try out an accordion layout for small grid
Show accordion only for small. Add video player placeholder img
Create a draft of how 'Related content' will look.
Add a footer to the episode layout
Episode detail: add episode number and duration
Use episode poster frame as video player placeholder
Episode detail: add download links for ogg/quicktime format vids
Add a link to the video transcript
Replace video placeholder with the real deal
Add a placeholder for social sharing buttons
Episode detail: add tags
Use accordion for shownotes+comments on medium and large layouts

If the medium media query matches (which is true for medium and large
grids), then the '#shownotes' panel will be activated. That only happens
when the page is first loaded, not when the page resizes.
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