KilterAPI: Add a user agent

Main: Clean filename before saving

prettier plots labels

breaking: replace max_skew with skew_range in circuit cli

add --save_plots to fit cli to write plots to files

Main: Add `angles` arg to fit

Main: Actually use the --angles arg

Merge pull request #3 from nyxkn/patch-1

fix off-by-one error in grades

Benchmarks: Remove baseline for scoring

Bugfix: Wrong parameter name

Add Readme.md

Benchmarks & KilterAPI: add some simple logging so we can track progress

Main: Allow passing the number of cores to use

Main: Reduce default min_repeats