Added stream input to the regular expressions, greatly simplifying the usage (in particular, we no longer have to specify the number of characters to be checked).

scanner.h

@@ -71,8 +71,6 @@ namespace YAML
 	private:
 		char GetChar();
 		void Eat(int n = 1);
-		std::string Peek(int n);
-
 		void EatLineBreak();
 
 		bool IsWhitespaceToBeEaten(char ch);