New Pangolin module

[ErikDanielsson]

Wrote new module Pangolin module, according to specification given in #1454. It might be that there are too many columns in the generated table, since I didn't know what was essential and non-essential to the report.

• This comment contains a description of changes (with reason)
• CHANGELOG.md has been updated

---

• There is example tool output for tools in the https://github.com/ewels/MultiQC_TestData repository or attached to this PR
• Code is tested and works locally (including with --lint flag)
• docs/README.md is updated with link to below
• docs/modulename.md is created
• Everything that can be represented with a plot instead of a table is a plot
• Report sections have a description and help text (with self.add_section)
• There aren't any huge tables with > 6 columns (explain reasoning if so)
• Each table column has a different colour scale to its neighbour, which relates to the data (eg. if high numbers are bad, they're red)
• Module does not do any significant computational work

[ewels]

This is in a core Python library? I don't think I've ever used this before 🤯

Learn something new every day! 😆

[ErikDanielsson]

Thanks for all the tips! I'll have to look through all the changes you've made and give the docs a more thorough read.