getting ready to unleash the beast

CLI:
  - implemented YAML file loading
  - implemented DELETE for containers
  - optimized internal methods for post/get to server
  - cleaned up YAML/JSON handling

CRUD:
  - implemented DELETE Key in CRUD librrary
  - implemented DELETE route for key values

MODELS:
  - updated containers model to cascade delete keys
  - updated keys model to cascade delete values

PURGE:
  - fixed bug causing some cache keys to not get properly purged