Fix #706.
Improved handling of missing rom files.
Changing game library location should now behave as expected (moving artwork, roms directory and store data) (issue #916).
Still has some rough edges.
Fix file headers for OEFileManager.
Remove unused code in OEFileManager.
Removed dead code, added notes on how to improve library migration.
Update Mupen64Plus submodule
Update PPSSPP submodule
Update submodule reference.
Update project settings and remove warnings.
Update submodule reference.
Update submodule reference.
Update OpenEmu-SDK submodule
Add Wiimote (RVL-CNT-01-TR) product name string to controller database
Update Higan submodule