This PR adds the login option to the nav drawer header.
After login, the user's G+ display name and profile picture is displayed on the header. A circular transform is applied to the profile picture to maintain consistency with other Material Design apps. The header has a 0.6 alpha primaryColor filter applied, so it has the color tint of the selected activity.
This PR adds the login option to the nav drawer header. After login, the user's G+ display name and profile picture is displayed on the header. A circular transform is applied to the profile picture to maintain consistency with other Material Design apps. The header has a 0.6 alpha primaryColor filter applied, so it has the color tint of the selected activity.
Screencast: https://vimeo.com/186100986
Fixes #526