Version 0.4.1

[ressy]

This is a small change compared with 0.4.0 from last fall, with some better error handling and reporting.

• Overhauled unit tests with more modular saved inputs and expected outputs (#92)
• Made warnings encountered in the chiimp script display as they occur, rather than at the end (#91)
• Made load_dataset warn about repeated Sample+Replicate+Locus entries across rows (#90)
• Made load_config warn about any unrecognized configuration file entries (#88)

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This discussion was created from the release Version 0.4.1.