Update README and add support for configuration file

db-upgrade

@@ -1,6 +1,6 @@
 #!/bin/bash
 set -e
-# source $(dirname $0)/../.include
+source .configuration.sh
 
 function add-version() {
   psql $PSQL_OPTS -c "update database_versions set is_active = false where is_active = true" $DB_NAME
@@ -16,4 +16,4 @@ for f in $(ls -1 migrations/*.sql | sort); do
     # No need to check return code because of the 'set -e'
     add-version $filev
   fi
-done
+done