characterRange = function( characterWalker, rangeLength )
		{
			this._ = {
				walker : characterWalker,
				cursors : [],
				rangeLength : rangeLength,
				highlightRange : null,
				isMatched : false
			};
		}
A range of cursors which represent a trunk of characters which try to
match, it has the same length as the pattern  string.