Remove hard-coded settings, defer to env. vars

PGUSER
PGPASSWORD
PGHOST
PGPORT

Other minor syntax simplifications
Add a README.md file to the db scripts directory
Fix some key issues, defer others by commenting out.
Merge branch 'master' into msgilligan-jenkins

Conflicts:
	database/scripts/db-init.sh
Merge pull request #18 from msgilligan/msgilligan-jenkins

Fix issues in schema, clean up shell scripts a little