Add date and link to the search results partial

[benlk]

Changes

• Adds date above the excerpt, in a small.date element
• Adds the permalink to the search results, below the excerpt
• Styles the date grey

Using wenews:

## Why

RNS-198.

[aschweigert]

I would prefer date and link both below the except, so:

Headline
Excerpt
Date | URL

[aschweigert]

also tighten up the space before/after the excerpt, just make that the same visual space as we have between the lines of text in the excerpt

[benlk]

Paragraph margin-bottom to 0, "Date | url" in play:

[aschweigert]

headline is probably a touch big on larger screens, let's merge and see where we're at