controller,router: Add timestamps to HTTP logs

Useful when debugging.

Example:

```
[router] 2014/09/23 17:03:53.560195 Started GET /routes
[router] 2014/09/23 17:03:53.560778 Completed 200 OK in 582.006us

[controller] 2014/09/23 17:02:08.161646 Started POST /apps
[controller] 2014/09/23 17:02:08.163668 Completed 200 OK in 2.019025ms
```