Added a "How to contribute" section, and improved readability of existing documentation.

[ThePurplePigeon]

• How to contribute

  • Added some items to guide new contributors in assisting in the project. These include direct code contributions, bug finds, documentation contributions, and features or improvement requests. These discuss best practices when making the kinds of changes listed, and ways people can contribute beyond traditional code additions.

• Readability

  • Made some changes to existing documentation lines, helping to improve understanding and readability. These are lightweight and mainly style preference, but help to make the project easier to understand.