Validation Framework 1.0

Due in about 3 months (04/20/2021)

11%

Related issues
	bug #6409: Fix failing Level3 validation in ValidationTest introduced by removing TaxonNameBase subclasses
	feature request #6387: [Rule] Rank rule for CultivarPlantNames
	feature request #6956: [Rule] Implement validation rules for virus names
	feature request #7982: [Rule] Validate correct usage of reference attributes for reference types.
	feature request #8010: [RULE] Validate allowDuplicates for FeatureTrees/TermGraphs
	feature request #8139: [Rule] Validate lectotype sources

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