Both commands already existed in commands/device.py but had no entry in
the README's command reference table, so users had no way to discover
them (reported as "missing"). Add rows under Advanced Configuration
explaining that mode controls how many bytes of each hop's node ID are
stored per hop in advertised/logged paths (bytes per hop = mode + 1),
matching the plen >> 6 / hash_mode + 1 logic in reader.py and
commands/base.py.
Fixes#84
logging.basicConfig() at import time in __init__.py silently clobbered the
embedding application's own logging setup. Replace it with a NullHandler so
the library stays silent by default without touching global config.
Also stop MeshCore.__init__ from unconditionally forcing the "meshcore"
logger to INFO when neither debug= nor only_error= is passed - only set a
level when the caller explicitly asks for one, otherwise leave whatever the
app already configured alone.
Document the idiomatic logging setup for consumers in README.md.
Fixes#58
Joey Leake