datamanager, metronome: set serialization at start.
mod_muc_log_http: fix log generation.
datamanager: don't attempt to auto-convert files.
convert_flat_files: add a conversion utility for flat files.
convert_flat_files: make script executable.
util.jsonload: rollback usage of cjson as it's completely broken and unusable.
datamanager: rollback #113, add still a (slow) way to use json like flat files.
convert_flat_files: reflect previous changes.