Possibly add explanatory text/an "about" section

[kaijagahm]

https://synesthesia.me/ has some pretty extensive explanatory text.

• I don't want to just repeat what she did/step on her toes
• If we do add explanation, where would it go? Perhaps a tabset panel where you can go to another tab at the top and see more of a webpagey thing?
• Maybe a bit about synesthesia and/or links to resources, but maybe a description of this project would be better suited. Could talk about our experience designing the app.
• I also sortakinda want to collect people's data! Maybe could make a github repo where people can submit their own synesthesia data so I can analyze it?
• Ooh I wonder if the app could also be expanded to include a page containing a dynamically-updating analysis of all the data people have submitted so far??

[kaijagahm]

Added a skeleton About page, and moved the about content to a separate script in https://github.com/kaijagahm/greenT/commit/56b9f7abacf7832aaeab146210454949b774a34d.

Need to add more, and ways to contribute your colors.