Fixed disconnect calling itself, instead of the db connection and added releaes command.

index.js

@@ -97,7 +97,19 @@ DB.prototype.execute = function(query, params) {
  */
 DB.prototype.end = function() {
     var db = this;
-    db.end();
+    db.pool.getConnection(function(err, con) {
+        con.release();
+    });
+};
+
+/**
+ * Disconnect from database
+ */
+DB.prototype.release = function() {
+    var db = this;
+    db.pool.getConnection(function(err, con) {
+        con.release();
+    });
 };
 
 module.exports = function(name) {
@@ -108,4 +120,4 @@ module.exports = function(name) {
     }
 
     return instances[name];
-};
\ No newline at end of file
+};