YAML parser in base (cloudinit support)

Hello everyone,

For nuageinit, I use a pure lua base yaml parser, which so far has been doing a
great jobs and works most of the time. The problem is the most of the time, some
people are using advanced yaml which are not supported by this parser like
references, also some corner cases of the yaml syntax are not supported by this
parser.

I think nuageinit should be able to accept any valid yaml syntax as such I plan
to import libyaml in base along with one of its lua bindings.

If people have better ideas, please raise a voice.

Best regards,
Bapt