Add lastExtentGenerationDate to DiseaseGroup
Use lastExtentGenerationDate (or automaticModelRunsStartDate) instead of classChangedDate when computing needsReview flag
Amend and test needsReview
Javadoc and unused imports
Comments
Revert getComparisonDate
Unused import
Remove double whitespace
Merge pull request #253 from SEEG-Oxford/324-rereview-polygons

Admin units are reviewable again after disease extent generation