Add initial `image` resizer project.

The CDN implciations of an image resizer should be evaluated first.
Merge branch 'master' of https://github.com/guardian/frontend into image-resizer

Conflicts:
	project/Frontend.scala
Patched up image server to compile after merge with master
Merge branch 'master' of https://github.com/guardian/frontend into image-resizer
Add im4java and move config out of URL space

1/ We can have a bake-off between im4java and scalr.

2/ I've moved width, height etc. out of the URLs for two reasons.

Firstly, it's trivial to DOS a site with image dimensions in it's parameters,

```
[5000..10000].each { |width| `curl http://path/to/image/#{width}/#{height}/jpg` }
```

Secondly, we favour [permanent URLs](http://www.w3.org/Provider/Style/URI.html). Adding the dimensions and compression ratio to your URLs guarantees
you'll change them frequently, screwing up your caches and worsening your SEO.
Remove unused imports
Added ImageMagick in to the setup instructions
Add max-age=86400 (1d) to outbound responses
Fix healthcheck
Merge branch 'master' of github.com:guardian/frontend into image-resizer
Akka config for image server
Remove broken healthcheck
Added log config for image server
Merge branch 'image-resizer' of github.com:guardian/frontend into image-resizer
Separate image/static/assets base urls in the configuration
Point DEV and CODE at the image server CODE ELB
Dynamically serve the contributor images
Alias the static.guim host to the image.host when the ImageServer switch is off (Ie. turn off dynamic image serving)
Go with profile image configuration as the first production test
Merge branch 'image-resizer' of https://github.com/guardian/frontend into image-resizer