Initial stab at restoring auto-save from JSON file upon on Resume
Added fix description for JSON-io constructor issue
CMade constructors resilient to null args for JSON-io object creation
Merge branch 'restore_autosave' of github.com:julianchurchill/text-adventure into restore_autosave
Updated backlog with completed autosave work
Adapted activity to cope better with injected view renderer and user action handler