sal/linux/sal.c: Replace one occurrence of SDL/SDL.h.
Added rom browser saving the last selected rom.

Each time a ROM is run, that position of the romlist is saved in a file.
When the ROM browser is launched, it loads the last rom position.
If a new default directory is saved, the rom position file is deleted.
small fixes
moar small fixes
Merge pull request #7 from hi-ban/master

Added rom browser saving the last selected rom.
Merge pull request #8 from JacopoSantoni/master

Fix libpng bug introduced by my previous pull request + misc fixes
Merge https://github.com/Nebuleon/PocketSNES