v0.4.1 - 2021-08-20

This release fixed a bug where passing a json file as configuration for a multi-table synthesizer crashed the model.
It also adds a number of fixes and enhancements, including: (1) a function and CLI command to list the available synthesizer names,
(2) a curate set of dependencies and making Gretel into an optional dependency, (3) updating Gretel to use temp directories,
(4) using nvidia-smi to get the number of gpus and (5) multiple dockerfile updates to improve functionality.

Issues closed

• Bug when using JSON configuration for multiple multi-table evaluation - Issue #115 by @pvk-developer
• Use nvidia-smi to get number of gpus - PR #113 by @katxiao
• List synthesizer names - Issue #82 by @fealho
• Use nvidia base for dockerfile - PR #108 by @katxiao
• Add Makefile target to install gretel and ydata - PR #107 by @katxiao
• Curate dependencies and make Gretel optional - PR #106 by @csala
• Update gretel checkpoints to use temp directory - PR #105 by @katxiao
• Initialize variable before reference - PR #104 by @katxiao