Removed the old and redundant build.xml-new.

Removed the old and redundant build.xml-new.

The property "dist.home" was defined but not used. Implemented now.
Target "dist" had a self-inclusion problem if dist.home equals
  deploy.home like default setting defined.
Added a "mrproper" target that deletes the whole deploy.home
Changed target "clean" to only empty the classes directory.
The default target "compile" now cleans the classes directory before
  compilation to ensure a clean build.
Target "compile" now calls the permissions script before finishing.