MSVCRT: Re-implement *printf

[Aneurin Price]

Changelog:

> Re-implement all *printf functions in msvcrt.dll, according to 
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_format_specification_fields_.2d_.printf_and_wprintf_functions.asp 
>
> and descriptions of appropriate functions.
> This should fix, among other things, bugs 321 and 2075.
>


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