1. -Fix a bug of calculate nBorderAdvanceX in FreetypeFontFace.cpp.
2. -Add default font logic.
3. -Use ipagp.ttf and Droid Sans Fallback.ttf instead of msyh.ttf.
4. -Fix a bug that we can use absolute path for resource now.
5. -Fix a bug assert in UIViewAgent.cpp.
6. -Uniform the font size. use 24 for all.