In these cases the site permalink is used instead of the social network
URL for sharing as defined in the `link` value
(https://www.linkedin.com/shareArticle in the below example)
Most visible case is LinkedIn but all social networks that have
```toml
[ananke.social.networks.particles]
...
params = "..."
```
in `config/_default/params.toml` are affected by this bug.
Closes#768.
* assets: replace Mastodon logo
The new version is based on the logo-black.svg file distributed from
https://joinmastodon.org/branding, adjusted to match the metrics of the
other social logos.
* layouts: change the color for the mastodon social link
I've picked a purple from https://joinmastodon.org/branding.
We look for .Params.featured_image
If found > we use that as URL
If we find a Page resource matching the value of the above, we use its .RelPermalink
If none of the above we look for an resource whose filepath contains `featured` or `cover` and use its .RelPermalink if found
Fixes#233Fixes#407
* Add support for auto-detection of featured images.
* Rename Partial, Add Documentation
Renamed the partial to func/GetFeaturedImage.html.
Additionally added more documentation in the partial to explain how it
worked, and what values were returned.
Co-authored-by: Sean Zimmermann <sz2243@columbia.edu>
