Takes pending designation off GitHubDataLoader tests

these tests where x-ed when we had rate limiting issues with GitHub. We no longer do. They were mistakenly left pending during the last merge to master.
User now redirects to her developer show page on log in.

* sessions controller now has valid redirect, no longer has comment
* adds requisite test to sessions_controller_spec
* fixes indentation in sessions_controller_spec
Merge pull request #18 from dmill/fix-login-routing

Fix login routing