added: wide characters can be used simultaneously with ascii characters
now we have two kind of methods: one for ascii characters and the other for wide characters
e.g.
void UInt::ToString(std::string & result)
void UInt::ToString(std::wstring & result)
previous was only one:
void UInt::ToString(tt_string & result)
and the 'tt_string' was a typedef to either std::string or std::wstring
and it was a little misleading to a user (he has to know what the tt_string is)
added: file: ttmathmisc.h some useful functions
changed: classes: ExceptionInfo, ReferenceError and RuntimeError are used only with ascii characters
removed: macros: TTMATH_USE_WCHAR, TTMATH_TEXT()
removed: typedefs: tt_char, tt_string, tt_ostringstream, tt_ostream, tt_istream
git-svn-id: svn://ttmath.org/publicrep/ttmath/trunk@193 e52654a7-88a9-db11-a3e9-0013d4bc506e
