Website updates

[Saira-A]

• Moves social media statement from contact page to policies page
• Updates the National Library of Scotland's logo to their new one
• Removes Google Calendar from community page
• Adds social media logos to contact page
• Adds text to policies page
• Updates roadmap page with coming soon text
• Moves showcase above features on index page
• Removes "logo" text from footer

[vercel]

@Saira-A is attempting to deploy a commit to the Universal Viewer Team on Vercel.

A member of the Team first needs to authorize it.

[demiankatz]

Thanks, @Saira-A! See below for a couple of questions.

[Saira-A]

Added the links, thanks @demiankatz

[demiankatz]

Thanks, @Saira-A, looks good to me now. Is this ready to merge, or do you plan to do anything more?

[erinburnand]

There's a couple of tasks on #165 that I didnt notice - should we at least make the edits to the documentation and events page (if we haven't already?)