Suggestion: Add 'Update User Profile' to Socially Tutorial

Hi,

I think it would be helpful to show in the socially tutorial the best way to allow users to update their profile (username, password, email address, bio, etc.).

I tried to implement it myself by using meteor.user() to get the information about the current logged in user. It works fine, but if I refresh the page it becomes undefined.

Actually it seems it has already been requested on the Trello Board and apparently marked as completed last January…