Update website address

I'm using <http://gray.clhn.co> for everything now, not xyz.iastate.edu.
Fix slanted small-caps

The 'lmodern' package overrides slanted small caps, so I removed it.  Somehow I
also started explicitly wrapping acronyms in '\textsl', so I removed those as
well.
Remove reference to stepm paper

Earlier versions of this paper reference my (sort of) in-progress stepm paper,
but it is not necessary.
Merge branch 'eds' into vcv