Modified error calcuations again.  Since residuals are trending and are
not normally distributed, I returned to bootstrapping them to determine
error.  Used An Introduction to the Bootstrap by Efron and Tibshirani to
calculate standard error and confidence intervals, correctly this time.
However, my DMS confidence intervals are still coming out weird.  Also,
I need to talk with Mark about whether or not I can ignore the trends in
the residuals.