function indexOf(match) {
			var i = matches.length;
			while (i--) {
				if (matches[i] === match) {
					return i;
				}
			}

			return -1;
		}
Returns the index of a specific match object or -1 if it isn't found.

@param  {Match} match Text match object.
@return {Number} Index of match or -1 if it isn't found.