Image resizer

Lets get this merged. 

@daithiocrualaoich spent a few days on this a couple of months ago.

Todo

 - Scan for Play 2.1 etc. compatibility.
 - Corresponding configuration in the platform project, dashboard graphs
 - A host name equivalent to _static.guim.co.uk_ via websys
 - Test with galleries (?) or something low traffic on frontend to benchmark performance

Usage

http://localhost:9009/resize/200/200/87/sys-images/Guardian/Pix/pictures/2013/3/26/1364324983855/Shopping-010.jpg