Import Processors in init files (aws#230)

This change adds import statements in the __init__ files of the `sagemaker` package and the `sklearn` package to make it easier for users to import Processor classes.

Author: ajaykarpur

src/sagemaker/__init__.py

@@ -50,6 +50,7 @@
 from sagemaker.model import Model, ModelPackage  # noqa: F401
 from sagemaker.pipeline import PipelineModel  # noqa: F401
 from sagemaker.predictor import RealTimePredictor  # noqa: F401
+from sagemaker.processor import Processor, ScriptModeProcessor  # noqa: F401
 from sagemaker.session import Session  # noqa: F401
 from sagemaker.session import container_def, pipeline_container_def  # noqa: F401
 from sagemaker.session import production_variant  # noqa: F401

src/sagemaker/sklearn/__init__.py

@@ -15,3 +15,4 @@
 
 from sagemaker.sklearn.estimator import SKLearn  # noqa: F401
 from sagemaker.sklearn.model import SKLearnModel, SKLearnPredictor  # noqa: F401
+from sagemaker.sklearn.processor import SKLearnProcessor  # noqa: F401