Readme additions and reformatting

[adam-eldredge]

Description of Change(s)

• Added table of contents
• Added 'About' section so new users can easily get an idea of what the project is
• Linked the website at the top
• Small formatting changes

Fixes Issue(s)

• N/A

If contributions to the readme are something you all are looking for, I'd love to hear feedback and make some changes. If not, no worries!