解决ofxml不能正确加载中文的问题, 因为of内部也需要用ofxSonovoUtil的转换方法,所以就直接放到了ofUtil里,并且函数名字由ofx变成了of.
添加ofxFontStash子模块.
add to ofxgui ofxDropDownList, ofxQuadWarp, ofxContent.
add newofxGuiExample.
Merge branch 'sonovo-master' of github.com:yty/openFrameworks into sonovo-master
提交.gitmodules.
Merge branch 'sonovo-ofxGui' into sonovo-master

Conflicts:
	.gitmodules
默认不使用中文，
ofxDropDownList,读取数值后也能调用注册的函数.
修正ofxDropDownList重复选择同一选单重复发消息的问题。
add ofQuadBezier();
Merge branch 'sonovo-ofGraphics' into sonovo-master
Merge remote-tracking branch 'remotes/origin/sonovo-master' into sonovo-ofxGui
Increase the font size adjustment function.