整理下字符串部分，向　VC 能编译目标前进
将更多的字符串进行转换
fix for vc build
use c++11 mode , u8"" string literal and avoid runtime code converting
Revert "use c++11 mode , u8"" string literal and avoid runtime code converting"

This reverts commit 4e7bc1a13ad539623a54516ea689da852c516847.
取消 literal_to_utf8str 使用了 #pragma excution_char_set 了嘛
可能是这个原因被禁言了!