Env var for setting pgsql xlog location
Remove bash math

Should work with dash now.
Add materialized view workload

Add a flag so that materialized views are used.  This makes the
tpc-h-like-workload more like a tpc-r-like-workload.  Currently only
have this for postgres.
Remove sleeps from postgres scripts

The wait flag works in the later versions of postgres.  If we start
working with older version of postgres, find a clean way to add sleeps
back in or something.
Remove data_collect directory redux

This was supposed to have been removed in:
0a26b233823b9c38fdfb3d882f06df62e6371da9
Script fix ups

Primarily updates so that the scripts will be more bourne shell
compatible.