added trim(...) functions to convert/text.h
void trim_first_white(std::string & str, bool check_additional_chars = true, bool treat_new_line_as_white = true);
void trim_first_white(std::wstring & str, bool check_additional_chars = true, bool treat_new_line_as_white = true);
void trim_last_white(std::string & str, bool check_additional_chars = true, bool treat_new_line_as_white = true);
void trim_last_white(std::wstring & str, bool check_additional_chars = true, bool treat_new_line_as_white = true);
void trim_white(std::string & str, bool check_additional_chars = true, bool treat_new_line_as_white = true);
void trim_white(std::wstring & str, bool check_additional_chars = true, bool treat_new_line_as_white = true);
void trim_first(std::string & str, wchar_t c);
void trim_first(std::wstring & str, wchar_t c);
void trim_last(std::string & str, wchar_t c);
void trim_last(std::wstring & str, wchar_t c);
void trim(std::string & str, wchar_t c);
void trim(std::wstring & str, wchar_t c);