0.0.9-beta

• Added transform labels method to Labeled Dataset
• Added Data Type helper
• Pipeline and Persistent Model are now Probabilistic
• Added stack method to dataset API
• Changed merge method on dataset to append and prepend
• Implemented specifications
• Added data type compatibility for estimators
• Added compatibility method to validation metrics
• Added estimator compatibility to reports
• Added trained method to learner API
• Added fitted method to Stateful transformer API
• Changed ordinal of integer encoded data types
• Added Adaptive optimizer interface
• Changed Transformer transform API
• Removed prompt method from Persistent Model
• Removed JsonSerializable from Dataset Interface