Fix escaped strings getting set in db

[tybruffy]

Currently running something like this:

wp.option.update('blogdescription', "A new tagline", function(err, data) {
    console.log("Tagline/description set.");
});

can result in the string A\ new\ tagline being set in the database. Wrapping the values of the args in double quotes when creating the cli args fixes this.

[ghost]

Is this planned to be merged? i am still having issues with strings resulting with "" between words...