[GNUnet-developers] make pretty

[ng0]

Hi,

as suggested in naming to me, you can now run

        make pretty

after a re-bootstrap and/or configure when uncrustify is detected and
subsequentially if yapf is detected.

The nesting is not perfect, but for now it works.

This should make the previous "pre-commit" file obsolete, I've moved it
to contrib for now.


The server side git hook is coming soon^TM.