Paths in "File" changed

To keep things more obvious I removed the folder "Help" and created the folder "Legacy".

The folder Legacy will contain all versions but the last version and version which had bugs. There will be also documentation for this versions tagged with version number. Versions with bugs will be removed from download.

The root folder will contain always the latest version together with documentation and essential text files. Please note that there is much more documentation regarding this library in the project JDecisiontable!

Each jar file contains the essential text files like README.txt, NOTICE.txt and LICENSE.txt.