Improvement github-box in mobile access

See the diferences:

![mobile-access-wrong](https://cloud.githubusercontent.com/assets/4191734/4942421/dea98e0c-65eb-11e4-834d-639799c168d3.PNG)

to

![mobile-access](https://cloud.githubusercontent.com/assets/4191734/4942426/e3e9f56e-65eb-11e4-8f67-09a6392183d9.PNG)