use bluebird as promise library

lib/emitters/custom-event-emitter.js

 var util           = require("util")
 var util           = require("util")
   , EventEmitter   = require("events").EventEmitter
   , EventEmitter   = require("events").EventEmitter
-  , Promise        = require("promise")
+  , Promise        = require("bluebird")
   , proxyEventKeys = ['success', 'error', 'sql']
   , proxyEventKeys = ['success', 'error', 'sql']
   , tick           = (typeof setImmediate !== "undefined" ? setImmediate : process.nextTick)
   , tick           = (typeof setImmediate !== "undefined" ? setImmediate : process.nextTick)
   , Utils          = require('../utils')
   , Utils          = require('../utils')

package.json

@@ -45,7 +45,7 @@
     "dottie": "0.0.8-0",
     "dottie": "0.0.8-0",
     "toposort-class": "~0.2.0",
     "toposort-class": "~0.2.0",
     "generic-pool": "2.0.4",
     "generic-pool": "2.0.4",
-    "promise": "~3.2.0",
+    "bluebird": "~0.11.5",
     "sql": "~0.28.0",
     "sql": "~0.28.0",
     "node-uuid": "~1.4.1"
     "node-uuid": "~1.4.1"
   },
   },