Consider renaming the sketches according to the theme / week number

[haschdl]

After downloading the source code and playing with a few sketches, very easily one gets lost with the cryptic names of the sketches:

This has downsides both for readers and contributors of the project. It is much more difficult for readers to switch between the descriptions in the web page and the sketch. Is a particular sketch for Autumn or for Time?

My suggestion is to include the week/chapter number and theme also in the sketch name. It might be redundant but it is very useful.