Create some screencast(s) showcasing Prelude

[bbatsov]

I recently got the feedback that for some people it's hard to understand what Prelude is exactly and how it differs from a vanilla Emacs (or another Emacs distribution). Some screencast(s) might help with this.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution and understanding!

[stale]

This issues been automatically closed due to lack of activity. Feel free to re-open it if you ever come back to it.