Show README.md files

[tclavier]

Is your feature request related to a problem? Please describe. For events such as weddings, it's handy to include a description file. For example:

• Religious ceremony at the church thingy
• Wine of honor on the church forecourt
• Photo in the old town
• Aperitif in the "foo" hall
• Dinner and party in the "bar" hall

Describe the solution you'd like In the Folder view, include the README.md widget already present in the "files" application above the photos.

Describe alternatives you've considered Show Markdown icon in place of thumbnail and switch to edit file on click.