Spelling in extraction scaladoc
Lift frequency option from virtualDefGen
Cleanup imports for Snapshot
Added ArbitrariesDictionary and VirtualDictionary
Use VirtualDictionary arbitrary in DictionaryImportValidateSpec
Add mandatory expression to virtual definition
Merge pull request #254 from ambiata/topic/dictionary-expression

Added expression to virtual definition
Adding ShadowRepository

Adding Shadow Input and Output Datasets

squash! Adding ShadowRepository

squash! Adding ShadowRepository
doing stuff

squash! doing stuff

squash! doing stuff