merge of features from hosted branch (#7)

major merge of features from the hosted branch that was created temporarily during the initial launch of jambonz.org

lib/db/index.js

@@ -1,5 +1,7 @@
 const getMysqlConnection = require('./mysql');
+const promisePool = require('./pool');
 
 module.exports = {
-  getMysqlConnection
+  getMysqlConnection,
+  promisePool
 };