Swap to minTestOk in ThriftDerserializationBehaviourSpec

This was a mistake
Remove unused Namespaces.partitionSizes
Extract separate Namespaces.namespaceSizesSingle
Introduced allNamespaceSizes to Namespaces
Extract BaseFactsPartitioner for rename
Add LongLongWritable for rename
Added ability to rename features
Merge pull request #204 from ambiata/topic/factset-rename

Added ability to rename features