Fixed getKey url in services

This is to address the issue where a 404 occured when the oauth_key did not exist in the user's localstorage.

The correct steps to getting ouath working currently is:

Go to the settings page, click register oauth, follow the sign in and authenticate your account.

When registration is complete, you can head back to the media center home page and then click youtube.

You should not be prompted for re-authenticating at this time because you just did so on the settings page.

Every once in awhile, you'll have to re-authenticate to Youtube and there are some error handlers that I wrote to address this in the previous merge.