Show red/amber/green transition frequency stats

[JonJagger]

On the web/dashboard, I could have an option to display stats. Eg [red,amber,green] => [red,amber,green] counts (as per this blog post). Might even be possible to "overlay" this with the size of the change (+added lines, -deleted lines). Contention is that

• get to amber correlates with bigger change (or more learning going on)
• departing from amber correlates with getting to amber.

These stats could even be compared to "global" stats for all katas with >=N events (eg N = 10)

With new fine-grained inter-test events it might be possible to filter out the high green-green value which I speculate is caused by file renames.