added config.options to allow named instance connections

Hi Kyle,

I was having trouble connecting to a named instance of MSSQL and I think I have isolated the problem down to the options object for the tedious driver.

Now when I add an options value to the connections,js it gets passed to tedious and I am able to connect to the MSSQL name instance.

Thought I'd share it with you :)

ProdDB: {
    adapter: 'sails-mssql',
    host: '127.0.0.1',
    user: 'xxxx',
    password: 'xxxx',
    database: 'xxxx',
    options: {
        instanceName: 'NamedInstance'
    }