Add Credits button to Title Menu
Add credits.txt
Fix memory leaks
Fix another memory leak
Allow text wrapping in CutScenes
Don't skip credits line
Merge pull request #620 from igorko/master

Add Credits button to Title Menu

I'll merge this for now, we still need to discuss how we want to have the credits of different mods be displayed.
Remove event "stash", but add event component "stash" again
Introduce "repeat" event component, drop "run_once" events
Add event "on_mapexit" which is triggered upon leaving the map