update readme to reflect changes that at the moment I reverted to not use promises as I am not yet sure if I want to have promises in the library, but let the user decide how to call the lsystem functions. We don't really do any per-asynchronous tasks (as connection with network, devices) so we'D have to input extra timeouts, adding more overhead and complexity that necessary at this point imo.
update readme to reflect changes that at the moment I reverted to not use promises as I am not yet sure if I want to have promises in the library, but let the user decide how to call the lsystem functions. We don't really do any per-asynchronous tasks (as connection with network, devices) so we'D have to input extra timeouts, adding more overhead and complexity that necessary at this point imo.

nylki/lindenmayer,nylki/lindenmayer