Added '#join <channel name' parameter and code to chat command. Modified help file for chat command to reflect changes. Changed mud.Utils arraylistToString(...) listToString and made it take List<String> rather than ArrayList<String>. Help file index is now generated on the fly by looking at the files in the help directory. Removed old file based index that had to be hand edited. Added command alias for '@backdb' to take '@backup' as the same command. Added command alias for '@alias' to take '@aliases' as the same command Renamed @alias help fil from '@aliases.txt' to '@alias.txt' to match command name.