Integrate bestselling books feed
Added metrics to report on disk space.
compile all the things
compile everything if no parameter supplied
logging text tweak
Refactor

Change Utils class to package object to be more idiomatic.
Integrate categorised bestselling books feeds

There are now multiple feeds that can be targeted by keyword.
abtest page style tweaks and... responsiveness!
fixing abtest module bug
added switch info relative expiry dates to abtests
Make some book properties optional
code shuffle
Deleted test controller.

Test is done :)
whitepsace formatting
leave expires table header
Fix loading bug
Refactor
Merge branch 'master' into kc-books

Conflicts:
	common/app/conf/switches.scala
Merge pull request #2912 from guardian/kc-books

Commercial: Integrate Bestsellers Feeds
Apparently progressive bicubic interpolation is the way to go...