This fixes the errors in the libraries that opsu uses that
the new html linter in the Java 8 javadoc tool catches and
classifies as error.
Whether or not this should be merged or whether this should
be fixed upstream first is for someone else to decide :P
This fixes the errors in the opsu src that the new html linter in
the Java 8 javadoc tool catches and classifies as error
(unless the linter is explicitly disabled)
Peter Tissen