add one more hint for developers, to explicitly point at docs/README.developers
[mmh] / test / tests /
drwxr-xr-x   ..
drwxr-xr-x - folder
drwxr-xr-x - manpages
drwxr-xr-x - repl
drwxr-xr-x - scan
drwxr-xr-x - whatnow