Settings are not saved properly

[etking]

CatSFC should be able to save and remember user defined audio / video settings and CPU frequency properly.

And it should be possible to save custom user settings, currently the startup settings also differ from settings after using "restore default settings".

[etking]

Aspect ratio settings set before loading a game should apply to the next game loaded. Currently they are reset to [3] whenever loading a new game. The default value should also be 4, since the average player prefers to see the full screen instead of just a part of it.