Delete shitty hack until someone does is properly
Remove homescreen tracking
Diagnostics logging of the AB test properties

We think we are losing 50% of AB test results, which is skewing the data.

This will show if we are sending data to Omniture correctly.

The test is scoped to 1/1000th of the audience.
Use ~ as a separator
Tidy up log string
Tidy up log string
Tidy up log string
Merge pull request #1190 from guardian/ab-test-diagnostics

Ab test diagnostics