Add request logging to application boxes

I think this is a useful thing to have anyway, but I need it to debug what's going on with RSS.

Gives output like

```
2014-12-06 01:49:20,901 [play-akka.actor.default-dispatcher-31] INFO  filters.RequestLoggingFilter$ - GET /uk took 1492ms and returned 200
2014-12-06 01:49:20,928 [play-akka.actor.default-dispatcher-32] INFO  filters.RequestLoggingFilter$ - GET /assets/stylesheets/fdd5d3909fb0c384801d5414c13d97b2/global.css took 1ms and returned 200
2014-12-06 01:49:20,928 [play-akka.actor.default-dispatcher-34] INFO  filters.RequestLoggingFilter$ - GET /assets/stylesheets/f60c940f3a63a997ddb886b78c2556be/head.facia.css took 1ms and returned 200
2014-12-06 01:49:20,929 [play-akka.actor.default-dispatcher-31] INFO  filters.RequestLoggingFilter$ - GET /assets/stylesheets/07037901fa8b88d014f32aae779ef412/print.css took 2ms and returned 200
2014-12-06 01:49:20,972 [play-akka.actor.default-dispatcher-28] INFO  filters.RequestLoggingFilter$ - GET /assets/javascripts/98b1e16296fdfbc97eaa99ee74638e65/core.js took 0ms and returned 200
2014-12-06 01:49:21,109 [play-akka.actor.default-dispatcher-28] INFO  filters.RequestLoggingFilter$ - GET /assets/javascripts/bootstraps/ebf66893f5a849539ea75833fcea876c/app.js took 0ms and returned 200
2014-12-06 01:49:21,109 [play-akka.actor.default-dispatcher-35] INFO  filters.RequestLoggingFilter$ - GET /assets/javascripts/bootstraps/3b1bc75998f3542ad6857091004cd8b5/commercial.js took 0ms and returned 200
2014-12-06 01:49:21,109 [play-akka.actor.default-dispatcher-32] INFO  filters.RequestLoggingFilter$ - GET /assets/javascripts/bootstraps/25db37c5183ac90166be86b65e9bf818/dev.js took 0ms and returned 200
2014-12-06 01:49:21,215 [play-akka.actor.default-dispatcher-34] INFO  filters.RequestLoggingFilter$ - GET /assets/javascripts/bootstraps/5e05cddce74bd4dc0d029a2d64d332b2/facia.js took 0ms and returned 200
2014-12-06 01:49:09,088 [play-akka.actor.default-dispatcher-25] INFO  filters.RequestLoggingFilter$ - GET /sport/cycling took 1047ms and redirected to /applications/sport/cycling
```
Can you split out `ms` away from elapsed? For logging if you need it