Fast-plotter

Fixed
- Travis deploy to pypi, PR 51

Added
- Option to control query engine in postproc, PR 49 [eshwen](https://github.com/eshwen)

Fixed
- Issue with uncertainty band on stacked plots, PR 45

Fixed
- Allow multiple expansions for KeepSpecificBins in postproc, PR 38

Added
- Useability tweaks for plotting

Fixed
- Edge bins when labels are alphanumeric are now full-width (not half-width)

Dropped
- No longer support python 2 (since we need Pandas >= 1.0)

Added
- Post-processing functions that interact with curator to apply or rebin datasets, PR 36 [benkrikler](https://github.com/benkrikler)