feat(trigger): allow pubsub monitor to be overridden (spinnaker#245)

refactor(pubsub): split into core and provider specific modules (spin…

…naker#244)

refactor(pubsub): split into core and provider specific modules (spin…

…naker#244)

chore(build): Parallel gradle tasks (spinnaker#242)

feat(email/slack): allow custom messages per notification (spinnaker#241

)

fix(stage notifications): consuming updated orca payload (spinnaker#238…

…) (spinnaker#239)

fix(stage notifications): consuming updated orca payload (spinnaker#238)

fix(pubsub): changing amazon subscription name (spinnaker#237)

feat(pubsub): adding support for AWS SQS/SNS (spinnaker#231)

* updating DockerHubArtifactExtractor because of a bump in spinnaker-dependencies

feat(notifications): Allow processing when template group is not pass…

…ed in request (spinnaker#234)

- handles subject/body processing when templateGroup is nil
- allows controlling formatting of subject/body