updated upgrade script to use mongo or redis

src/database.js

@@ -1,6 +1,13 @@
 
 
-var nconf = require('nconf');
-	db = require('./database/' + nconf.get('database'));
+var nconf = require('nconf'),
+	databaseType = nconf.get('database');
+
+	if(!databaseType) {
+		winston.info('Database type not set! Run npm app --setup');
+		process.exit();
+	}
+
+var db = require('./database/' + databaseType);
 
 module.exports = db;