core: No code changes, just reformatting according to Erlang Emacs mode before making actual changes
core: Update lager - use master instead of fixing any specific version + move logs to the log folder (lager may use sasl backend but with the current configuration sasl has nothing to do with lager, it's probably an artefact from pre-lager times - since the config is changing anyway it's a good time to fix this).
core: tidy-up after asking lager to log to 'log' instead of 'sasl' folder + move webmachine-specific logging options to the webzmachine application + get rid of no longer used configuration options
z_stats: Start the webmachine access logger