Email Address was missing for LinkedIn

Hello,

This is amazing library you have created. It really simplifies the oAuth login process. I found a missing scope for the LinkedIn service. It was a pretty simple fix. I added 'email-address' to the original get request and then updated the formatUser function to map emailAddress to email. Please let me know if you have any questions.

It looks like this is a pretty common oversight; for more information take a look at https://developer.linkedin.com/comment/19813#comment-19813

-Darren