Add KVOWithBlocks submodule.
Don’t nuke a check box’s checkbox/radio button images.
Implement more properties that actually affect platform-specific code, like ‘rect’ and ‘visible’. Rename the property that decides what a movie player shows to ‘movie’ and fix a bug in backtracking in the parser we discovered because of this.
Web browser now sends ‘loadPage’ message again, and actually looks at the ‘currentURL’ property to decide what to load.
Movie player now sends playMovie and stopMovie when movie playback starts/stops.