Consolidate settings in _config.yml?

[mdelarioja]

I have been playing with the latest release, which brings a lot of great improvements. One thing I miss from the previous version, however, is being to manage all my settings directly from _config.yml. The previous implementation seemed more elegant in that regard, and I was wondering if it might be possible to implement that again. I realize doing so would limit the options available, but perhaps focusing on a few core features (e.g. expiring caches, offline analytics, custom offline page) would be sufficient.

Thoughts?