Test if config samples are valid trough StyleCI API

[soullivaneuh]

See comment: #67 (comment)

[soullivaneuh]

@GrahamCampbell about this, not sure this is the place for your API but it would be great to be able to download a config reference of .styleci.yml file with all the possible keywords.

Because the current problem is: If you add a config keyword, the bridge will throw an error because it does not know this one.

If I can integrate the config reference under the tests, I'll be warned of the issue very quickly thanks to Travis.

What do you think?

[GrahamCampbell]

I think there is one in the docs.

[soullivaneuh]

Yeah... but I was thinking about something more... automatic? :-)