a good reading

[Marcin Kasperski]

> It looks very close to the forest extension (maybe with a better
> integration).

There is some problem with forest extension. Namely: it exists, so it
seems that submodule problem is solved, but it is very poorly
documented, and uses unnatural syntax (all those snapshot files, what
are they???), so a lot of people are confused while trying to use it.

Maybe somebody could take a look at it and polish a little bit...