Hatari 2.4.1 update

Hatari update to 2.4.1 (Windows and Linux), minor internal improvements and javadoc additions.

Initial release

Allows to launch one or multiple instances of the Hatari emulator. The "DesktopWindow" reference return value allows to access the window, bring it into the foreground, using the included JNA library, and control the emulator (to a degree) by sending it keyboard input using the Java Robot API.

NOTE: The required JNA functionality currently only works on Windows, so Linux support may be limited. Will hopefully be improved in the future. Also, MacOS is currently not supported - if you need it, please add it yourself, pull requests always welcome!