Added Support for Char DataType as a Parameter

Fix for #205 

I am noob with CoffeeScript, and this is also the first time digging into tedious code base. I was able to insert data into a SQL Server database with a TYPE.Char parameter(Code shown below) Let me know if I went about this right or if any changes should be made.

````
connection.on('connect', function(err){
    if (err) {
        console.log(err);
        return;
    }
	var request = new Request("INSERT INTO test.charTest (charType) VALUES (@charTypeValue)",
	function(err){
		if(err){
			console.log(err);
		};
	});

	request.addParameter('charTypeValue', TYPES.Char, 'TheFred');
    //request.addParameter('charTypeValue', TYPES.VarChar, 'TheFred');

	connection.execSql(request);
});
````