Node.js 0.8 + Domain + Promises-based handlers

Requests still fails under the heavy load:

```
› wrk -c400 -t12 http://localhost:3014/?__mode=json
```
will start spaming logs with **a lot** of error-message:

```
...
[Mon Jun 10 2013 05:19:55 GMT+0400 (MSK)] ERROR Error cached for "/?__mode=json", socket hang up. Error: socket hang up
    at createHangUpError (http.js:1360:15)
    at OutgoingMessage._writeRaw (http.js:507:26)
    at OutgoingMessage._send (http.js:476:15)
    at OutgoingMessage.write (http.js:740:18)
    at OutgoingMessage.end (http.js:882:16)
    at modules.define.t._onCompleted (/Users/varankinv/webs/prj-www/desktop.bundles/common/_common.node.js:1:12173)
    at Array.Promise._callCallbacks [as 85] (/Users/varankinv/webs/prj-www/node_modules/vow/lib/vow.js:200:39)
    at callFns (/Users/varankinv/webs/prj-www/node_modules/vow/lib/vow.js:458:35)
    at process.startup.processNextTick.process._tickCallback (node.js:244:9)
[Mon Jun 10 2013 05:19:55 GMT+0400 (MSK)] CRITICAL Error sending proper error status for "/?__mode=json" [Error: Not running]
```