DSP Emulator 0.18 Final

多機種模擬器 DSP Emulator 發布新版，更新如下 :

-General
    +Lazarus: Changed then way SDL library initializes the audio, using the newer functions
    +Better Open/Save dialogs. Now work the last directory used for each system
    +Changed where and when the SDL library is initializated
-NES
    +Fixed mappers 1, 4, 12, 67 and 68
    +Added mappers mmc6, 11 and 147
-Contra
    +Added DIPs switches
-Knuckle Joe
    +Added DIPs switches and 2nd player
-Super Basketball
    +Added DIPs switches and 2nd player
-Iron Horse
    +Updated to version K

https://github.com/leniad/dsp-emulator