definitions instead like Windows does.
Always define wchar_t (suggested by Dimitrie O. Paun), and use wchar_t
everywhere instead of WCHAR to avoid depending on Windows headers.
Added implementations of fwscanf, swscanf, wscanf and sscanf.
Corrected the declaration of swscanf.
Added implementation of the l, h, L and w prefixes.
Added implementation of the c, C, s, S and n types.