A place to compile our thoughts/code.
src/prototypes contains source code of fully-built projects, not necessarily
divided into coherent steps. These are finished products that we can use to
derive lessons.
src/lessons/<name> contain the individual lessons. I propose that these
folders should be named, and not numbered, with the README responsible for
linking to them in a sensible order—that way, we can swap them around if we
so choose.
doc/ contains documentation and thoughts about the project. Naturally,
this is a revision controlled repository, so change things up as you see
fit!