revamp CHANGES
Added mopherd -v switch and bumped version to 0.5.0
Cosmetics

  - Changed default user and group to nobody and nogroup. Makes mopher run out
    of the box without adding user and group.

  - Beautified error logging at startup
Don't overwrite existing config files

  - Make install now tests if config files exist before installing
  - Added basic mopherd.acl file
Log a warning if mopherd runs as nobody or nogroup