Give more explanation in the end-of-mission finish message

Minor change to finishMessage dialog, to show more explanation on why the player succeeded/failed
@alexnodejs - I expect there is a better way of handling the "type" parameter, so that we just have to pass 'success' or 'warning'.  

It feels a little clumsy to pass 'panel-success', but I couldn't see how to let the `data-ng-class` element (below) become the concatentation of` 'panel-'` and the `{{config.type}}` element.