MIST-190 Proper guest runners for info, streaming, and async requests
MIST-190 Replace hardcoded action type strings with iota constants
MIST-190 Bugfix for fetch image response decoding
MIST-190 Style: remove unnecessary else
MIST-190 Add simple job log for async jobs

Track async job status (queued, running, errored or complete) and
provide endpoints for retrieving the last X jobs and a specific job's
status
MIST-190 Send the guest job id back in X-Guest-Job-ID header
MIST-190 Clean up some switch blocks stylistically
Merge pull request #21 from mistifyio/MIST-190

MIST-190 - Agent guest info, stream, async queues and Guest Job Log