update dump/load scripts

Fixed CREATE defaulted to YES, now safer NO
Allow load.bety.sh to use environment variables (CREATE=YES
./scripts/load.bety.sh for example)
Brookhaven = 2
don’t use sudo, use psql as current user, assuming current user has
rights to create/drop table if CREATE=YES
removed error code for severe, default is not to quit.
added and fixed tests

added test to check pft names
fix test in case no outdir specified (no longer tmpdir)
fix code checking pfts
updated documentation
added libraries needed to import
Merge branch 'master' of github.com:PecanProject/pecan