Engine: added returns on "placeOnScene" functions, returns the placed object
Engine: added dialog on close callback function
Engine: added special type of scene, ComicScene, display a sequence of static images
UI: changed the layout of inventory to vertical, to allow better application of items in the scene
UI: changed the dialog font to one that supports the entire Latin alphabet
Finished the last scene, fixed a few continuity bugs and added prologue/epilogue comics