Release 0.2.0 - 9/29/2018

Major Features

Support for OpenPAI (aka pai) Training Service
- Support training services on pai mode. NNI trials will be scheduled to run on OpenPAI cluster
- NNI trial's output (including logs and model file) will be copied to OpenPAI HDFS for further debugging and checking
Support SMAC tuner
- SMAC is based on Sequential Model-Based Optimization (SMBO). It adapts the most prominent previously used model class (Gaussian stochastic process models) and introduces the model class of random forests to SMBO to handle categorical parameters. The SMAC supported by NNI is a wrapper on SMAC3
Support NNI installation on conda and python virtual environment
Others
- Update ga squad example and related documentation
- WebUI UX small enhancement and bug fix