Protocol Match Not Dependent On Containing an :

This change enables users who config the orm through an object instead of an string to work with this plugin.

Now a config such as this will work

``` js
orm.connect({
    "protocol": "mysql:",
    "host": "127.0.0.1",
    "database": "*********",
    "user": "*********",
    "password": "*********",
    "query": {
        "pool": true
    }
}, function (error, db) {
        .....
});
```