Improvement about Save Load.

Also load another files besides main savedata and sfo file,seems some games require this.

I have also cleaned up some code to make it clearer.

This fix Fushigi no Dungeon Fuurai no Shiren 4 Plus Kami no Hitomi to Akuma no Heso.

Attach screenshot here.
Before:
Display this all the time(the savedata was broken).
![qq20131104001526](https://f.cloud.github.com/assets/3080636/1461314/89e8dad0-44a4-11e3-8b29-e57d988049f6.png)

Fixed:
![qq20131104001446](https://f.cloud.github.com/assets/3080636/1461315/922ab146-44a4-11e3-9889-0effcde633d2.png)