Start corrections to bootstrap result for vcv convergence

The initial 'proof' of theorem 3--convergence of the bootstrap distribution
to the limiting distribution of the statistic--is pretty wrong.  I'm
fixing it by explicitly invoking de Jong and Davidson's vcv result for the
convergence of the bootstrap variance.  This commit adds part of it, but
the LLN for the deriviatives and stochastic equicontinuity still need to be
established.
Update website address

I'm using <http://gray.clhn.co> for everything now, not xyz.iastate.edu.
Finish edits to bootstrap normality

Makes additional changes to the statement of Theorem 3 and to the proof of
asymptotic normality for the bootstrap process, so that I can invoke de Jong
and Davidson's proof for the convergence of the second moment.
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
Remove extra patter from the supporting results appendix
Edit proof of oos bootstrap normality

This commit makes some extensive changes to the oos bootstrap normality
result; I change the conditions to better match West's argument, and I
spell out most of the details of the proof.
Minor edits
Merge branch 'eds' into vcv