Petropy

Added
- Gradients for filled curves
- Inventory las files from given folders
- Wolfcamp examples
- autodetect_encoding to LASFile requiring cchardet on install

Fixed
- Downloading las data from KGS and University Lands
- Electrofacies calculations

Fixed
- Graphs error with window location

Fixed
- Data included in distribution

Fixed
- Wheel source distribution

Added

- Log object
- Subclass of [lasio](https://github.com/kinverarity1/lasio) LASFile
- Calculates petrophysical properties
- Exports statistics
- LogViewer object
- displaying log data
- interacting with log data
- manually manipulate and redraw curves
- bulk shift curve data
- Electrofacies function for digital rock types
- Dataset function to read packaged data
- Download functions to download public data
- ul_lands_download() from Texas Unversity Lands
- kgs_download() from Kansas Geologic Society
- package added to PyPI registry