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)
Merge branch 'master' of github.com:guardian/frontend into dynamic-contributor-images
Added IMgSrc class to understand resized images
New test files
Merge branch 'master' of https://github.com/guardian/frontend into dynamic-contributor-images

Conflicts:
	common/app/conf/switches.scala
Point DEV/CODE at i.gucode.co.uk
Merge pull request #669 from guardian/dynamic-contributor-images

Dynamic contributor images