New C# NatureListComboBox compiles in Linux, can't use it yet without System.TypeLoadException
Added rest of ComboBoxes, removed unnecessary WndProc override
Java changes

* Changed package name to org.nc.LibPKMN
* Changed Core package to LibPKMN
* Adjusted generate_enums.py and unit tests accordingly
Added AbilityListComboBox
Added rest of ComboBoxes
swig: removed extended pokemon_text functions
java: improved UnsatisfiedLinkError message