Display values for captured value dice, take 2

Fixes #389.

Although the code is complete, this pull request is currently incomplete, since I need a hand working out how to add the appropriate QUnit tests. My attempt can be seen in my branch 389_with_QUnit_tests, but for some reason (I'm probably missing something), I don't seem to be able to load the Game object.

Once I work out how to add the QUnit tests correctly, I'll merge that branch into this one and do a Jenkins run.
Newline at the end of this file, please (i'm not sure why the checker doesn't complain about it, but anyway i have now noticed).

Also, if it's easy, you might make the whitespace match the other JSON files --- i think a global substitution of ":" into ": " will more or less do it.