-------------------
- methods `install_packages` and `install_missing_packages` of module `weka.core.packages` now
allow a list of package names instead of tuples (name, version), assuming `latest` as version
- method `get_jclass` in module `weka.core.classes` can handle primitive classes now as well
(eg `int` -> `java.lang.Integer.TYPE`)
- methods `get_non_public_field` and `call_non_public_method` in module `weka.core.classes`
allow accessing private/protected fields and calling private/protected methods of Java objects,
which avoids having to sub-class classes to get public access to them (NB: only works as long
as the security manager allows that)
- added `split_commandline` method to module `weka.core.classes`, which splits a command-line
into classname and option list tuple
- the `Instances` class (module: `weka.core.dataset`) now supports slicing
- added methods `plot_xmlbif_graph` and `xmlbif_to_dot` to module `weka.plot.graph` for plotting
XML BIF graphs generated by BayesNet using GraphViz
- added method `plot_graph` to module `weka.plot.graph` to plot dot or XML BIF graphs