Added a few comments to the default configuration.
Changed the default dateformat to a more readable one.
Added a star "*" option in the worlds list for all the worlds.
Disabled by default the automatic backup "interval" option.
Created cron task option to make advanced automatic backups.
Bug Fixes
The JAR file can now be used externally (without depending on CraftBukkit/Spigot).
Changed AM/PM time to 24H mode for cron tasks (thanks for reporting this dixy999).
Changed permissions of generated files including "PerfectBackup" & "Backups" folders, config.yml and backups folders/zip files (thanks for reporting this KNLS).
