The deserialize code in urth-core-dataframe should only need to convert Date objects. The other primitive JS types should be handled by JSON. The extra wrapper objects on primitive types are unnecessary and may not always get coerced back to primitives, depending on how they're used. We can also avoid the unnecessary processing client-side for these other types.
[x] Remove wrappers for all JS primitive types
[x] R should use primitive types, not convert everything to strings
The deserialize code in urth-core-dataframe should only need to convert Date objects. The other primitive JS types should be handled by JSON. The extra wrapper objects on primitive types are unnecessary and may not always get coerced back to primitives, depending on how they're used. We can also avoid the unnecessary processing client-side for these other types.