MetroidArch v1.0.2

Fix for the crash on save reported in issue #1.

If the app crashed while saving (usually right after backgrounding it or getting a save at a save station) and then wouldn't load again, that's fixed now. There was a race condition between two threads touching the same save data at once, plus the save wasn't actually getting written to disk when you closed the app normally, so progress could get lost even without a crash.

If you weren't hitting that crash, this doesn't change anything for you.