Fixed bug when backing up directories
Added logging of backed up files to the mod log
Added MOD prefix when appending a mod entry
Added generating of the search file
Changed modtime routine
Added shouldUpdate function
More concise search file deleting
Added no change backup directive
Fixed bug in function shouldUpdate
Added actual backing up and adding handled files to an index
Added handling of removed files
Fixed bug when checking if root directory needs a backup
Added existence check for backup root entry
Fixed bug when reporting backup size when nothing had to be done
Removed unused sec2date function
Added availability check for backup destination