Come up with a better solution for logging

[iameli]

Logging in SK is interesting. We definitely don't want to always log, say, every line of FFMpeg output from every Vertex -- there's just too much there. Or every time a TCP connection happens or anything. It's just too much. Our metadata shouldn't exceed the size of our data.

But I do think it'll be really useful once we're starting to scale up to have the ability flip on verbose logging on an ad-hoc basis. If some particular vertex is behaving strangely, I want SK to tell me every bit of data about that vertex.

Additionally, I don't want this ad-hoc setting to occur over the usual API channels. If the API server is malfunctioning, I want to be able to get very verbose output from it.

[iameli]

Hmmmm yes... I think in development I want everything logging verbosely and we filter on the dev-logs view. end.

[iameli]

Logspout should be fine for logs, we just need something coherent to consume the stream. Elasticsearch? Kibana?