Give more details on unit test output

This adds an output handler for Busted which reuses the built-in "utfTerminal"
handler, and augments it by showing the name of each suite/test as it is run.

.busted

@@ -2,5 +2,6 @@
 return {
    _all = {
       verbose = true,
+      output = "spec.detailUtfTerm",
    }
 }