Clicking "Issues" gives 404 error if not logged in to github

Created by: Waldo000000

From the Bob homepage (http://idiap.github.com/bob/), clicking on "Issues" (http://github.com/idiap/bob/issues) or "GitHub" (http://github.com/idiap/bob) both result in a 404 error. The user has to first go to github.com and log in, then return to the Bob homepage.

Suggested fixes:

1. The user should be able to log in directly from the Bob homepage, or
2. Rather than 404, the user should be issued with a more informative error & instructions