Accept prebuilt Query object in connection.query

This allows support code to construct a Query instance to be used with
a connection made available in the future.

Author: grncdr

lib/Connection.js

@@ -63,6 +63,11 @@ Connection.prototype.query = function(sql, values, cb) {
 
   var options = {};
 
+  if (sql instanceof Sequences.Query) {
+    // query(new Sequences.Query(options, cb))
+    return this._protocol._enqueue(sql);
+  }
+  
   if (typeof sql === 'object') {
     // query(options, cb)
     options = sql;