- Making Excel output optional.

- Slightly improving Excel output file.

- Adding support for writing and reading settings for consistency bet…

…ween exe runs.

- Fixing a bug where previous leaderboard data was not added to the o…

…utput file if only certain songs were selected.

- Improving individual song leaderboard query by identifying the minimim season available to the song on first pass, then using that on subsequent passes.

Update README.md

Merge branch 'master' of https://github.com/SFenton/FortniteFestivalL…

…eaderboardScraper

Update README.md