Fixed article indexer showing articles it shouldnt
Fixed codes indexer not showing "show" link
Fixed error in code type if no prefix was set.
Renamed upkeep.rb to upkeep.rake
Group system now supports clan based management

Groups can now be associated with a clan ID.
Clan Role Settings groups can now only be groups with the clan's clan
ID.
Authorized clan members can edit other clan member's groups, but only
those for groups which the clan's clan ID.