Updating release-multiplatform.json
Removing this.getClass().getCanonicalName()
Removing this.getClas().getCanonicalName() from SaveGameTest
Refactoring EditorIO.exportAsJAR and ExportGame so the path of the engine library can be configured more easily. That is to facilitate tests and exportation from shell
Adding a class for supporting exportation of the games from the shell
Adding a test