Sparkle-log

Added

- Decorator support for async functions
- Start support for arbitrary custom metrics

Fixed
- Bug on new graph types when denominator would be 0.

Added

- Supports graph styles: bar, faces, jagged, linear, vertical, ascii_art, pie_chart
- Supports new metric, "drive" for free drive space

Fixed
- Merged fix to upstream library to fix 3.12 warnings.

Added

- Colorlog in demo.
- Tidy up vertical alignment
- Expand readme

Added

- Initial version. Most things work.
- Context manager
- Direct code access
- Decorator.