Release 0.9 - 7/1/2019

Major Features

General NAS programming interface
- Add enas-mode and oneshot-mode for NAS interface: PR #1201
Gaussian Process Tuner with Matern kernel
Multiphase experiment supports
- Added new training service support for multiphase experiment: PAI mode supports multiphase experiment since v0.9.
- Added multiphase capability for the following builtin tuners:
  - TPE, Random Search, Anneal, Naïve Evolution, SMAC, Network Morphism, Metis Tuner.
For details, please refer to Write a tuner that leverages multi-phase
Web Portal
- Enable trial comparation in Web Portal. For details, refer to View trials status
- Allow users to adjust rendering interval of Web Portal. For details, refer to View Summary Page
- show intermediate results more friendly. For details, refer to View trials status
Commandline Interface
- nnictl experiment delete: delete one or all experiments, it includes log, result, environment information and cache. It uses to delete useless experiment result, or save disk space.
- nnictl platform clean: It uses to clean up disk on a target platform. The provided YAML file includes the information of target platform, and it follows the same schema as the NNI configuration file.

Tuner Installation Improvements: add sklearn to nni dependencies.
(Bug Fix) Failed to connect to PAI http code - Issue #1076
(Bug Fix) Validate file name for PAI platform - Issue #1164
(Bug Fix) Update GMM evaluation in Metis Tuner
(Bug Fix) Negative time number rendering in Web Portal - Issue #1182, Issue #1185
(Bug Fix) Hyper-parameter not shown correctly in WebUI when there is only one hyper parameter - Issue #1192