0.8.6

Frame.rename now accepts optional arguments for index and columns renaming.

Series.rename now accepts an optional argument for index renaming.

Added Frame.relabel_shift_in() and Frame.relabel_shift_out().

Fixed issue where Frame.dropna() fails on single-columns Frame.

Extended IndexHierarchy.level_drop to perform corresponding drops on name when name is an appropriately sized tuple.

Extended Frame.set_index to support creating a 1D index of tuples when more than one column is selected.