New serialize framework. Refactor serialization into modules.
Maple dma xfer must not be executed immediately. Delay until interrupt
is raised.
Fixes Geist Force freeze at start.
Verify md5 of flash, eeprom, vmus if no savestate used
Use chd header SHA1 as digest
Load .state.net state file at start
Force real BIOS for some games
Pass LoadProgress object to report load progress and cancel
Better UI
Cancel with exception
Fix issues when stopping/exiting in !threaded
dx9: call gui_term on shutdown