Progbg

Restructuring of the ProgBG API be more object oriented. Meaning LineGraphs contains Line objects, or BarGraphs contain Bar objects. This
feels more intuitive when creating these graphs.

* Stripped some checks away to reduce feature bloat
* Added styling for graphs for cleaner looks (colorblind and printer friendly color schemes as well)
* Added Linting with the black pip module.

Addition of SQLite DB backend for organizing output from benchmarks

Quality of life improvements.

ProgBG Initial Release

Includes:
* Compositional Backends
* Registration for both Backends and Benchmarks
* Creation of Executions which take cross produce of changing variables to produce full range of benchmark output
* Basic Graphing support (Bar and Line) with limited options
* Basic server for viewing of graphs plus underlying data.