Store Login & Full Name from Github

* Adds login (username / handle) and name (full name) to database
* Displays login on account settings page under Github Service.

#### Before:
![show_github_id](https://s3.amazonaws.com/prod_object_assets/assets/5218098327387/CodeMontage-3.jpg?AWSAccessKeyId=AKIAJATICW4U3O4HFIEA&Expires=1372634611&Signature=mmIm7QFTvLaQQ%2BFCOx7d5%2F9A9K8%3D)
#### After:
![show_github_login](https://f.cloud.github.com/assets/226228/727969/a72fea5e-e1d3-11e2-8f87-451d1bb825bf.jpg)