Author bio as subtitle in profile layout.

[dsluo]

E.g.:

This would provide a built-in solution to some of the confusion in #38. I have a pretty quick implementation here: dsluo/congo@788f1a6.

Alternatively, and perhaps preferably, there should be a separate subtitle option that defaults to the author bio, but I don't know if Hugo has an option for custom options in config.toml.

[jpanther]

I agree that the current way this works is confusing. I'll look at options to improve this in a future release.