Revert "Pass State function into PriorityTagDeserializer constructor to ensure correct handling"

This reverts commit 1343fc911120a895055d6016aa8fcd59bfd7baeb.
Revert "Extract PriorityTagDerializer for reducing prioritized thrift values"

This reverts commit d1cc061412ada4b334023c2735411e505183c10e.
Merge pull request #213 from ambiata/topic/revert-priority-mr-stuff

Revert PriorityTagDeserializer changes
Revert "upgraded to the latest specs2"

This reverts commit 7635044c041c1298b7f7a816cfce8ca621e1778f.
Revert "Revert "upgraded to the latest specs2""

This reverts commit be63c2fefdcedab241d63332f22ab9754ef5b1e2.
Changed FeatureStore to list of in mem Factsets