cFileFormatUpdate will loop through old files and convert them to new files (should replace legacy old format loading code)
cItem has two new functions to load from Json and output Json, this will keep the items in Json standard
ChestEntity and FurnaceEntity use the new functions in cItem
git-svn-id: http://mc-server.googlecode.com/svn/trunk@35 0a769ca7-a7f5-676a-18bf-c427514a06d6
