Merge branch 'dev'
+ added prototype FTP upload functionality
+ added additional library commons-net for FTP capabilities

* refactored thread handling into separate class BackupManager
* fixed world auto save not being turned off properly
* fixed running backup task in actual Thread
+ added missing status messages in FTPTask

* modified build script to include external libraries in the mod jar
Merge branch 'dev'
* updated changelog
Merge branch 'master' into dev
* FTP upload no longer deletes backup files, can be configured via maxBackupCount and persistentEnabled
* minor modification to info messages
Merge branch 'dev'
Update README.md
Merge branch 'master' into dev
* changed default value for maxBackupCount to 10
* some code cleanup before first full release
* added acceptableRemoteVersions parameter to YABM class so clients without the mod installed can still connect
* added parameter checks to commands to avoid error messages
* added missing checks in BackupTickHandler
* added method didLastTaskSucceed in FTPTask
* fixed backup consolidation being run when ftp upload failed
* fixed chat messages not being properly localized when sent to a client that doesn't have the mod installed
* added localizations