Cheats: added checkbox to enable cheat immediately after adding
Update database model to include header and serial attributes for ROM entity

These will be used to get the header and serial of ROMs on import at the system plugin level (like canHandleFile)
Update OpenEmu-SDK submodule ref
Extend import and lookup system to perform DB matches on ROM header or serial if implemented by -[OESystemController headerLookupForFile: and -[OESystemController serialLookupForFile: in system plugins
Implement headerLookupForFile: for SCD system plugin
Implement headerLookupForFile: for SS system plugin
Update yabause submodule