Enhancement: more benevolent LeafEntry #141
Description
Currently, the following fails:
julia schema(["1", 1])
ERROR: InconsistentSchema at root: Can't store `Int64` into `LeafEntry{String}`!which is ok as long as we want to process the data in this leaf all as Strings or all as Numbers. However, if the amount of values is small, we might want to process this as a categorical variable.
In such case, we need a way of schema creation that wouldn't fail. What would be a suitable interface for this?