* Issue #419 - Add ability to dump heap profile by sending SIGUSR2

* Regenerate Gopkg.lock

Move k8s health assessment into a stand-alone library. Use kubectl convert to statically assess health (#356)

Add 'database' library for CRUD operations against repos and clusters. Redact sensitive information (#196)

* Issue #119 - Move sync logic to contoller

* Implement app compare/sycn e2e test

* Fix panic in kube ApplyResource method

* Apply reviewer notes: add separate rollback operation instead of reusing sync for sync and rollback

* store credentials in files (instead of encoded in URL) to prevent leakage during git errors
* fix issue where HEAD would not track updates from origin/HEAD (resolves #133)
* refactor git library to promote code reuse, and remove shell invocations

* Issue #69 - Auto-sync option in application CRD instance

* Fix possible NPE error in controller

* Correctly handle situation when cluster is temporary down/unreachable by argocd

* Handle case when argo monitor cluster which go offline and recover