* send response to requestor
 * out-of-order responses
 * add listener tables (for requests, responses and other messages)
 * config-parser (file and improve parser for modules config)
 * finish API for command & response dispatch tables
 * module API etc. clean-up, finalize, freeze
 * add modules
   - tcp
   - udp
   - unix
   - inotify
 * exec module, add support for parameters
 * improve module loader (allow multiple search paths)