Update supporting Ren'Py 8.4

I made an update to support visual novels made with Ren'Py 8.4 for the RenPy Game Viewer. Some of the changes in Ren'Py 8.4 where breaking for loading rpyc files inside the visual novels. Also other changes in Ren'Py are added to the application (e,g. the new layeredimage when condition) 

Some new features where added:

• A list of most recently used games so you quickly open the last 10 visual novels you opened before
• Add/Remove the application to you start/application menu (settings)
• Display original line numbers of decoded rpyc files (enable/disable it in settings, default disabled)

Fixed some bugs and updated some of the used libraries.