Workaround bom header (#211)

This PR removes the utf8 bom encoding header which was causing issues.
This PR also adds support for unicode characters in the terminal on
windows.

For context it looks like the BeamNG launcher only encodes it with the
utf8 header, which is what it's currently removing.

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include/Utils.h

@@ -21,12 +21,14 @@
 #define beammp_fs_string std::wstring
 #define beammp_fs_char wchar_t
 #define beammp_wide(str) L##str
+#define beammp_stdout std::wcout
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #else
 #define beammp_fs_string std::string
 #define beammp_fs_char char
 #define beammp_wide(str) str
+#define beammp_stdout std::cout
 #endif
 
 namespace Utils {