Add example for proxying resize to external server

Allows tiles and thumbnails/medium JPGs to go through an external
server, thus removing *all* image derivatives from chronam
Trim down WSGI process count

- Drops all reference to chronam-wsgi-images
- Halves process and thread counts for chronam-wsgi-app
- Sets max requests to 10,000 for chronam-wsgi-app just in case of
  memory leaks

There is no more need for image-specific processes, and the rest of the
app seems to run just fine at the moment.  Obviously this is pretty
UO-specific, and is a VERY BAD idea for anybody without an external
image server.
Fix thumbnail on newspaper title page