Documentation on YAML namespace

[beltiras]

I only have cursory knowledge of ruby so I don't even know where to begin figuring out the type mapping. There is no mention of Foreign Keys and custom types (if one wanted a streaming replication of hashes and lists, this is a must).

Some sort of schema inference would be nice too, there is a Javascript that does similar things at https://github.com/JamesCropcho/variety

This is a great project thou and will take a ton of headaches from a migration I'm managing. Thanx!