v2.0.4

PowerSystems v2.0.4

Diff since v2.0.3

Closed issues:

• Give better error message if a user stores a component inside the System ext field (#971)
• Print Time Series Names (summary) when displaying component summary (#973)
• validation process is broken for PSY1.x systems when using PSY2.0 (#974)
• PowerLoad time series issue in PSY2.0 (#975)

Merged pull requests:

• Check for invalid values in component ext (#977) (@daniel-thom)
• Improve printing of time series instances (#979) (@daniel-thom)