Mldock

- moves to use of the template field, replacing platform in config
- also makes sure that --template=None defaults container init to use template from mldock.json

- supports storing your templates in a remote, using github Personal Access Token whether public or private
- splits out template commands from container commands
- adds setting templates server configurations in configure
- removes the encoder/decoder go-between methods to allow users to use the numpy_to_csv or csv_to_numpy methods directly in their containers
- bugfix: numpy_to_csv now supports a double quoted format supported by sagemaker
- bugfix: to container serving handling non-supported content-type

- type casting should be left up to the user
- this allows decoder/encoder platform helpers to be fairly general purpose