Update font

Even most of the main screen is now using system font, but still have some parts, e.g, save/load menu, PSPCredits infos etc are still using zim font and yields mojibakes. as:
![screen00002](https://f.cloud.github.com/assets/5306849/1062417/8281f8fc-124b-11e3-82a3-8c9bcc7973da.jpg)

Compile your code with the new cpp/h files will fix them. as:
![screen00003](https://f.cloud.github.com/assets/5306849/1062418/95757b1e-124b-11e3-8cc3-e4f6330f1825.jpg)

PS1： I am surprising to see my name appear in the recent version! thanks! 
But in fact I am not qualify to be added in the list of translator. I almost do nothing about translation. I am a developer. Although I do some works on improving multilingual compatibility for ppsspp as the improvement in this post. But I am not a translator... I am not good at english as you see, I speak french and chinese ...and I indeed believe that there are many good translators to help in this project. Thanks all the same to your welcome and trust on me. 

PS2: "updates" is not for request. since I've just update the lang and native folders after my post. You need only merge  https://github.com/kaienfr/ppsspp_cn/commit/9aa7f492eaa781daa4906dcec44810165b8dbed1