Catch all exceptions from MapDecompiler

Version 1.2.0

Update README

Don't throw exception during text resources initialization

Open chooser dialog before stage initialization

Version 1.1.3

Fix typo in method name

Fix NPE when the game is not installed

Version 1.1.2

Fix typo

Add null checks

Check if savegame has teleports for the difficulty

Version 1.1.1

Add an option to convert all textures inside a directory

Version 1.1.0