Adds description field to AnalysisGroup.

[andrlik]

Fixes #31

[coveralls]

Pull Request Test Coverage Report for Build 11502747614

Details

• 6 of 6 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 11487887899:	0.0%
Covered Lines:	1701
Relevant Lines:	1701

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💛 - Coveralls