support dasherized multi-word names?

When using ember-cli, it seems like it would be helpful to support the same inflection patterns for dasherized and undasherized names. Instead, I find myself doing the following:

```
Ember.Inflector.inflector.uncountable('phrase-tones')
Ember.Inflector.inflector.uncountable('phraseTones')
```

Of course, if I always wanted anything ending in `tones` to be uncountable, then I could just register the last word, but sometimes it's only class names that I want to be uncountable (i.e., in the case where each record represents a plural set of things).

Does the inflector know about word boundaries as presented in camelCase? This is a little tricky because of all-caps acronyms. Perhaps it could work as follows. If one registers the `phrase-tones` case then it also registers the phraseTones case, but not viceversa.