0.5.8b
	* Security fixes 
	  + When burning a CDR, mktemp is used to prevent attacks on the file
	    system.
	  + It is possible to make the archive repository readable/writable by
	    a given user/group pair.
	* Features	
	  + The configuration file is now validated before running.
	    Warnings are triggered if configuration keys are not set.
	* Bug fixes
	  + If the filetype "tar.bz2" is chosen, /usr/bin/bzip2 is mandatory.
	  + The pre-command is run before the creation of the archive
	    repository.
	  + No trailing spaces are lost anymore when printing messages.
	* New configuration keys:
	  + BM_PURGE_DUPLICATES tells if duplicates should be replaced by
	    symlinks (default is yes).
	  + BM_REPOSITORY_SECURE tells if the archive repository and the
	    archive should be readable/writable by a given user:group (default
	    is yes).
	  + If BM_REPOSITORY_SECURE is activated, BM_USER and BM_GROUP should
	    be filled (default is root:root).
	  + BM_BURNING_CHKMD5 tells if the MD5 checksums should be checked when 
	    a CDR is burnt (default is yes).
	  + BM_BURNING_DEVFORCED tells backup manager to force a device
	    whenever a cdrecord command is performed, and then bypass the
	    default cdrecord device (default is disabled).