Support `scala.util.Try` serialization

[ttim]

Currently chill doesn't support Try serialization, because it doesn't support java's Throwable serialization (see https://github.com/EsotericSoftware/kryo/issues/532 for details). It worth adding Throwable serialization to chill-java package and, maybe, explicit serialization Try serialization to chill package.

[johnynek]

I agree this would be useful.