CYCLUS_DEBUG_DRE for extra DRE info dump when running simulations

Just set CYCLUS_DEBUG_DRE=1 in your environment when running cyclus to create
tables for information on all request and bids during a simulation in the
database.
Merge branch 'dre-dump' of github.com:rwcarlsen/cyclus into rwcarlsen-dre-dump
Merge branch 'rwcarlsen-dre-dump' into develop