0.9.16

Added memory property to display memory usage via MemoryDisplay interfaces.

Implemented the DataFrame Interchange Protocol export via the Frame.__dataframe__() interface.

Implemented __repr__() for ILoc.

Updated Batch.__repr__().

Added name parameter to Frame.to_frame(), Series.to_frame(), and related methods.

Improved error reporting for invalid IndexHierarchy.

IndexHierarchy.from_index_items() now supports items of IndexHierarchy.