Added - Implement the multiply_values with a mapping, PR 35 [benkrikler](https://github.com/benkrikler)
0.6.4
Added - New postprocessing stage to filter columns, PR 34 [benkrikler](https://github.com/benkrikler) - New option to AssignCols stage to make assignment the index, PR 34
Fixed - ToDatacardInputs had been broken in a previous update, PR 34
0.6.3
Added - Add ability to rotate x-axis tick labels from config - Add GenericPandas and UnstackWeights stages, PR 33 [benkrikler](https://github.com/benkrikler)
0.6.2
Fixed - Fix `split` function in postproc module to work with numbers, PR 32 [benkrikler](github.com/benkrikler)
0.6.1
Added - Option to specify which columns contain bin values rather than labels, PR 31 [benkrikler](github.com/benkrikler)
Fixed - Report package version number properly, PR 31
0.6.0
Added - Proper support for non-constant interval widths