A test for specific event names (and possible fix).

As [Daslicht](http://stackoverflow.com/users/1527027/daslicht) observed over at [StackOverflow](http://stackoverflow.com/questions/25673742/ractivejs-stuck-at-tutorial-4-event-proxies) (in the comment, not in the main thingie), events named after array mutators won't fire.

Here's the [failing fiddle](http://jsfiddle.net/Writhe/qoqzve03/1/).

I tracked it down to a falsely positive check in getPotentialWildcardMatches(), patched it up, ran the tests.
It _seems_ to work.

Cheers!